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2020s 2021 2boys 2d animated animated_gif black_pants blue_jacket blush chimo_(utdt_game) digital_media humanoid jacket male male_only monster monster_boy pants sans_(undertale) simple_background skeleton striped striped_pants thank_you undead undertale white_stripes yellow_background 2020s 2021 2boys 2d animated animated_gif birthday black_pants blinking blue_jacket brothers cape carrying carrying_person chimo_(utdt_game) dated digital_media english_text flag floating_cape gloves happy_birthday humanoid jacket male male_only monster monster_boy pants papyrus_(undertale) red_cape red_gloves sans_(undertale) siblings simple_background skeleton striped striped_pants text undead undertale white_stripes 2020s 2022 2boys 2d black_pants blue_background blue_jacket blue_shorts brothers cake cape chimo_(utdt_game) digital_media food food-themed_background gloves holding humanoid jacket legs_apart male monster monster_boy onigiri outline pants papyrus_(undertale) red_cape red_gloves sans_(undertale) shorts siblings simple_background skeleton striped striped_pants sweat undead undertale whipped_cream white_outline white_stripes 1boy 1other 2020s 2022 2d ambiguous_gender animated animated_gif birthday black_pants blue_jacket blue_shirt boots brown_hair chimo_(utdt_game) digital_media english_text frisk_(undertale) gift gift_box happy_birthday human humanoid jacket male monster monster_boy pants sans_(undertale) short_hair shorts simple_background skeleton striped striped_pants striped_shirt text undead undertale white_stripes 1boy 1other 2020s 2022 2d ambiguous_gender animated animated_gif birthday black_pants blue_jacket blue_shirt bone boots brown_hair candle chimo_(utdt_game) digital_media dog english_text frisk_(undertale) happy_birthday heart human humanoid jacket male monster monster_boy pants sans_(undertale) short_hair shorts simple_background skeleton striped striped_pants striped_shirt text undead undertale white_stripes 1other 2020s 2022 2boys 2d ? akimame ambiguous_gender artist_name black_pants blue_shorts brothers brown_hair cape character_print christmas christmas_sweater digital_media flower flowey_(undertale) frisk_(undertale) gloves green_sweater hand_on_own_chin human humanoid leaning_forward long_sleeves male monster monster_boy oversized_clothes pants papyrus_(undertale) plant red_cape red_gloves sans_(undertale) short_hair shorts siblings skeleton sleeves_past_wrists striped striped_pants sweater undead undersized_clothes undertale white_stripes yellow_flower 1girl 1other 2020s 2022 2boys 2d ? ambiguous_gender animated animated_gif anthro artist_name ayinspanner black_pants blue_shorts brothers brown_hair cape character_print christmas christmas_sweater digital_media female floppy_ears frisk_(undertale) fur furry furry_female gloves goat goat_ears goat_girl goat_horns green_sweater hands_on_own_hips height_difference horns human humanoid long_sleeves male mammal monster monster_boy monster_girl oversized_clothes pants papyrus_(undertale) procreate_(medium) red_cape red_gloves sans_(undertale) short_hair shorts siblings simple_background skeleton sleeves_past_wrists standing striped striped_pants sweater toriel turtleneck turtleneck_sweater undead undersized_clothes undertale white_background white_fur white_horns white_stripes 1girl 1other 2020s 2022 2boys 2d ambiguous_gender anthro bandaid black_pants blue_shorts blurry_background brothers brown_hair cape character_print christmas christmas_lights christmas_sweater clenched_hands closed_eyes digital_media female floppy_ears frisk_(undertale) fur furry furry_female gloves goat goat_ears goat_girl goat_horns green_sweater hand_on_own_chin hands_up horns human humanoid long_sleeves male mammal monster monster_boy monster_girl oversized_clothes pants papyrus_(undertale) red_cape red_gloves sans_(undertale) short_hair shorts siblings simple_background skeleton sleeves_past_wrists striped striped_pants superbecky sweater toriel turtleneck turtleneck_sweater undead undersized_clothes undertale white_fur white_horns white_stripes 1girl 1other 2020s 2022 2boys 2d ambiguous_gender anthro black_pants blue_shorts brothers brown_hair cape character_print christmas christmas_sweater digital_media dragonartdraw female floppy_ears frisk_(undertale) fur furry furry_female gloves goat goat_ears goat_girl goat_horns green_socks green_sweater hands_on_own_hips hands_together horns human humanoid long_sleeves male mammal merry_christmas monster monster_boy monster_girl oversized_clothes pants papyrus_(undertale) profanity red_cape red_gloves sans_(undertale) short_hair shorts siblings skeleton sleeves_past_wrists socks spread_arms striped striped_pants sweater text toriel turtleneck turtleneck_sweater undead undersized_clothes undertale white_fur white_horns white_stripes 1girl 1other 2020s 2022 2boys 2d ambiguous_gender anthro black_pants blue_shorts brothers brown_hair character_print christmas christmas_sweater digital_media english_text female floppy_ears frisk_(undertale) full_body fur furry furry_female gloves goat goat_ears goat_girl goat_horns green_sweater hand_on_own_hip headpat horns human humanoid long_sleeves male mammal monster monster_boy monster_girl oversized_clothes pants papyrus_(undertale) poetax red_gloves red_scarf sans_(undertale) scarf short_hair shorts siblings simple_background skeleton sleeves_past_wrists speech_bubble standing striped striped_pants sweater tapping_foot text thumbs_up toriel turtleneck turtleneck_sweater undead undersized_clothes undertale white_background white_fur white_horns white_stripes 1other 2020s 2022 2boys 2d ambiguous_gender animated animated_gif arms_up black_pants blue_shorts brothers brown_hair cape character_print chimo_(utdt_game) christmas christmas_sweater digital_media frisk_(undertale) gloves green_sweater human humanoid long_sleeves male monster monster_boy oversized_clothes pants papyrus_(undertale) red_cape red_gloves sans_(undertale) short_hair shorts siblings simple_background skeleton sleeves_past_wrists striped striped_pants sweater undead undertale white_stripes 2010s 2016 2boys 2d 3girls alphys alternate_costume anthro asgore_dreemurr black_eyepatch digital_media dinosaur dinosaur_girl dress ear_fins eyepatch female fins fish fish_girl floppy_ears fur furry furry_female furry_male glasses goat goat_boy goat_ears goat_girl goat_horns hair head_fins horns humanoid husband_and_wife ian621_(u6cj8482621) lizard lizard_girl lizard_tail long_hair male mammal mirror monochrome monster monster_boy monster_girl multiple_boys multiple_girls papyrus_(undertale) ponytail reflection reptile reptile_girl reptile_tail scalie skeleton toriel undead undertale undyne white_fur white_horns 2010s 2016 2boys 2d 2girls :t alphys alternate_costume anthro bare_shoulders blue_jacket blue_skin bowl brothers cape chewing clenched_hands digital_media dress female fish fish_girl food glasses gloves grill hair hitting holding holding_bowl holding_tongs humanoid ian621_(u6cj8482621) jacket lizard lizard_girl long_hair long_sleeves looking_at_viewer male meat monster monster_boy monster_girl open_mouth papyrus_(undertale) plate ponytail red_cape red_gloves red_hair reptile reptile_girl sans_(undertale) scalie siblings simple_background skeleton table tongs undead undertale undyne white_background yellow_skin 2010s 2016 2d alligator alphys ambiguous_gender animal anthro arachnid arthropod arthropod_girl asgore_dreemurr asriel_dreemurr beard black_hair black_pants blonde_hair blue_fur blue_jacket blue_shirt blue_shorts blue_skin boots bottle bratty_(undertale) brothers brown_fur brown_hair burger burgerpants cape cat cat_boy cat_ears cat_girl cat_tail catty_(undertale) chara_(undertale) chibi cousins crocodile cup digital_media dragon dragon_boy everyone facial_hair father_and_son female fish fish_girl floppy_ears flower food fork frisk_(undertale) furry furry_female furry_male ghost glass gloves goat goat_boy goat_ears goat_girl goat_horns green_body green_shirt green_skin hair_over_one_eye high_heel_boots horns hot_dog human humanoid ian621_(u6cj8482621) jacket knife lizard lizard_girl lizard_tail long_hair male mammal mettaton mettaton_ex monster monster_boy monster_girl monster_kid_(undertale) mother_and_son muffet multiple_arms multiple_boys multiple_eyes multiple_girls multiple_others napstablook nice_cream_guy pants papyrus_(undertale) pasta phone pink_sclera pink_stripes plant plate popsicle purple_fur purple_skin rabbit rabbit_boy rabbit_ears red_cape red_gloves redhead reptile reptile_girl reptile_tail robot robot_boy royal_guard_01_(undertale) royal_guard_02_(undertale) sans_(undertale) scalie short_hair shorts siblings simple_background skeleton slit_pupils spaghetti spear speech_bubble spider spider_girl steak striped striped_pants striped_shirt sushi teacup toriel undead undertale undyne weapon white_background white_fur white_horns white_stripes yellow_sclera yellow_skin 2010s 2016 2d alphys ambiguous_gender animal anthro arachnid arthropod arthropod_girl asgore_dreemurr asriel_dreemurr beard black_hair black_pants blonde_hair blue_jacket blue_shirt blue_shorts blue_skin boots brothers brown_hair cape chara_(undertale) chibi copyright_name cousins digital_media everyone facial_hair father_and_son female fish fish_girl floppy_ears flower food frisk_(undertale) furry furry_female furry_male ghost gloves goat goat_boy goat_ears goat_girl goat_horns green_shirt hair_over_one_eye high_heel_boots holding holding_food horns hot_dog human humanoid ian621_(u6cj8482621) jacket ketchup_bottle knife lizard lizard_girl lizard_tail long_hair male mammal mettaton mettaton_ex monster monster_boy monster_girl monster_kid_(undertale) mother_and_son muffet muffet's_pet multiple_arms multiple_boys multiple_eyes multiple_girls multiple_others napstablook pants papyrus_(undertale) pasta phone pie pink_stripes plant purple_skin red_cape red_gloves red_hair reptile reptile_girl reptile_tail robot robot_boy sans_(undertale) scalie short_hair shorts siblings simple_background skeleton snail spaghetti spear speech_bubble spider spider_girl striped striped_pants striped_shirt text toriel undead undertale undyne weapon white_background white_fur white_horns white_stripes yellow_skin 1boy 2020s 2024 2d artist_name bent_over black_background black_pants blue_jacket bone chromatic_aberration dark_background digital_media drawstring film_grain full_body glowing glowing_eye grey_hood hood hood_down hooded_jacket humanoid inset_border jacket legs_apart male male_only monster monster_boy pants sans_(undertale) skeleton slippers solo striped striped_pants tuku_rugk twitter_username undead undertale white_stripes 1boy 2020s 2024 2d black_background blue_shorts cape chromatic_aberration closed_mouth dark_background digital_media film_grain floating_cape gloves hand_on_own_chest hand_on_own_hip humanoid long_gloves male male_only monster monster_boy papyrus_(undertale) red_cape red_gloves shorts simple_background skeleton solo tuku_rugk undead undertale upper_body 2020s 2024 2boys 2d baseball_bat black_pants blue_jacket blue_shorts brothers carrying_over_shoulder chromatic_aberration cloud digital_media duo film_grain full_body hand_in_pocket holding holding_baseball_bat humanoid jacket male male_only monster monster_boy pants papyrus_(undertale) sans_(undertale) school_uniform shorts siblings sitting sitting_on_stairs skeleton sky stairs standing tuku_rugk unbuttoned unbuttoned_shirt undead undertale 1boy 2020s 2024 2d black_background black_pants blue_jacket bone broken_heart chromatic_aberration dark_background digital_media drawstring film_grain full_body glowing glowing_eye grey_hood heart hood hood_down hooded_jacket humanoid jacket leg_up male male_only monster monster_boy outstretched_arms sans_(undertale) simple_background skeleton slippers solo spread_arms striped tuku_rugk undead undertale uneven_eyes upper_body 1boy 2020s 2023 2024 2d back black_background blue_shorts boots cape chibi copyright_name dark_background digital_media full_body gloves humanoid long_gloves looking_at_viewer looking_back male male_focus male_only monster monster_boy papyrus_(undertale) red_boots red_cape red_gloves shorts simple_background skeleton solo text tuku_rugk undead undertale 1boy 2020s 2023 2024 2d black_background black_pants blue_jacket chibi copyright_name dark_background digital_media drawstring full_body grey_hood hood hood_down hooded_jacket humanoid jacket male male_focus male_only monster monster_boy pants sans_(undertale) simple_background skeleton slippers solo text tuku_rugk undead undertale 2020s 2024 2boys 2d black_background black_pants blue_jacket blue_shorts brothers cape chibi copyright_name dark_background digital_media drawstring duo english_text full_body gloves grey_hood hands_on_own_hips hood hood_down hooded_jacket humanoid jacket male male_only monster monster_boy pants papyrus_(undertale) red_cape red_gloves sans_(undertale) shorts siblings simple_background skeleton slippers text tuku_rugk typo undead undertale 1boy 2020s 2024 2d black_background black_pants blue_jacket chibi copyright_name dark_background digital_media drawstring full_body grey_hood hood hood_down hooded_jacket humanoid jacket male male_focus male_only monster monster_boy pants sans_(undertale) simple_background skeleton slippers solo text tuku_rugk undead undertale 2020s 2023 2boys 2d artist_name black_background black_pants blue_jacket blue_shorts brothers cape chromatic_aberration copyright_name dark_background digital_media drawstring duo english_text film_grain full_body gloves grey_hood hands_up holding hood hood_down hooded_jacket humanoid jacket long_gloves male male_only monster monster_boy one_eye_closed pants papyrus_(undertale) red_cape red_gloves sans_(undertale) shorts siblings simple_background skeleton slippers spread_arms striped striped_pants text tuku_rugk twitter_username typo undead undertale white_stripes 1boy 2020s 2023 2d black_pants blue_jacket digital_media full_body humanoid jacket male male_only monster monster_boy one_eye_closed pants pink_slippers sans_(undertale) simple_background skeleton slippers solo tuku_rugk two-tone_background undead undertale white_background 1boy 2020s 2023 2d black_pants blue_jacket chromatic_aberration digital_media drawstring film_grain full_body gasterblaster glowing glowing_eye grey_hood hand_in_pocket hood hood_down hooded_jacket humanoid jacket leg_up male male_only monster monster_boy pants sans_(undertale) skeleton skull slippers solo striped striped_pants tuku_rugk undead undertale white_stripes 1boy 2020s 2023 2024 2d bone cape chromatic_aberration digital_media film_grain gloves holding holding_bone humanoid letterboxed long_gloves male male_only monster monster_boy open_mouth papyrus_(undertale) red_cape red_gloves simple_background skeleton solo tuku_rugk undead undertale upper_body 1girl 1other 2020s 2023 2024 2d 3boys ambiguous_gender anthro armor black_eyepatch black_hair black_pants black_sclera blue_jacket blue_shirt blue_skin bone breastplate brothers brown_hair cape chromatic_aberration cowboy_shot digital_media drawstring ear_fins eyepatch female film_grain fins fish fish_girl frisk_(undertale) full_body gauntlets gloves glowing glowing_eye grey_hood hair_over_one_eye hand_in_pocket head_fins heart holding holding_bone holding_spear holding_weapon hood hood_down hooded_jacket human humanoid index_finger_raised jacket leg_up letterboxed long_gloves long_hair looking_at_viewer male male_only mettaton mettaton_ex monster monster_boy monster_girl multiple_boys open_mouth pants papyrus_(undertale) ponytail red_cape red_gloves red_hair redhead robot robot_boy sans_(undertale) sharp_teeth short_hair siblings simple_background skeleton skull slippers spear striped striped_pants striped_shirt sweat teeth tuku_rugk undead undertale undyne undyne_the_undying upper_body weapon white_ white_stripes yellow_teeth 2020s 2023 2boys 2d blue_jacket brothers cape digital_media drawstring duo gloves grey_hood holding hood hood_down hooded_jacket humanoid jacket male male_only monster monster_boy pants papyrus_(undertale) red_cape red_gloves sans_(undertale) shorts siblings skeleton tuku_rugk undead undertale 2020s 2024 2boys 2d artist_name black_pants blue_jacket blue_shorts boots brothers cape chibi clenched_hands digital_media drawstring full_body gloves grey_hood hands_up holding hood hood_down hooded_jacket humanoid jacket long_gloves male male_only monster monster_boy one_eye_closed orange_background outside_border pants papyrus_(undertale) red_boots red_cape red_gloves sans_(undertale) shorts siblings skeleton slippers sparkle striped striped_pants tuku_rugk twitter_username two-tone_background undead undertale white_stripes 2020s 2023 2boys 2d black_background black_pants blue_jacket blue_shorts brothers cape chromatic_aberration copyright_name crossed_arms dark_background digital_media drawstring english_text film_grain full_body gloves grey_hood hand_on_own_knee hood hood_down hooded_jacket humanoid jacket long_gloves male male_only monster monster_boy one_eye_closed pants papyrus_(undertale) red_cape red_gloves sans_(undertale) shorts siblings simple_background skeleton slippers squatting striped striped_pants text tuku_rugk undead undertale white_stripes 1other 2020s 2023 2boys 2d ambiguous_gender animal animal_on_head annoying_dog apron blue_jacket blue_shirt bone brothers brown_apron brown_hair cape digital_media dog dog_on_head drawstring food frisk_(undertale) full_body gloves grey_hood holding holding_food holding_plate hood hood_down hooded_jacket hot_dog human humanoid jacket long_gloves male male_only monster monster_boy notice_lines pants papyrus_(undertale) pasta pink_stripes plate red_cape red_gloves sans_(undertale) short_hair siblings skeleton spaghetti striped striped_shirt tongue tongue_out too_many too_many_dogs tuku_rugk undead undertale white_dog 2020s 2022 2boys 2d arm_around_neck blue_jacket brothers cape chromatic_aberration digital_media duo gloves humanoid jacket looking_at_viewer male male_only monster monster_boy one_eye_closed papyrus_(undertale) red_cape red_gloves sakito_(mg_1016) sans_(undertale) siblings simple_background skeleton star_(symbol) undead undertale upper_body v white_background 1boy 2020s 2022 2d blue_shorts bone boots cape digital_media gloves holding holding_bone humanoid male male_only monster monster_boy papyrus_(undertale) red_boots red_cape red_gloves sakito_(mg_1016) shorts simple_background skeleton solo source_request undead undertale white_background 1boy 2020s 2022 2d blue_shorts bone boots cape commentary digital_media gloves humanoid legs_up male male_only monster monster_boy papyrus_(undertale) red_boots red_cape red_gloves sakito_(mg_1016) shorts skeleton solo undead undertale 2020s 2022 2boys 2d brothers cape car commentary convertible digital_media driving duo english_text foreshortening gloves humanoid male male_only monster monster_boy motor_vehicle one_eye_closed papyrus_(undertale) pointing pointing_forward red_cape red_car red_gloves sakito_(mg_1016) sans_(undertale) siblings simple_background skeleton speech_bubble star_(symbol) text undead undertale upper_body vehicle 2020s 2022 2boys 2d abstract_background black_pants boots brothers cape carrying carrying_person duo gloves humanoid jacket looking_at_viewer male male_only monochrome monster monster_boy one_eye_closed pants papyrus_(undertale) sakito_(mg_1016) sans_(undertale) shorts siblings skeleton striped striped_pants traditional_media undead undertale 2020s 2022 2boys 2d black_pants boots brothers cape commentary duo gloves hand_up holding holding_umbrella humanoid jacket looking_at_viewer male male_only monochrome monster monster_boy one_eye_closed pants papyrus_(undertale) puddle reflection sakito_(mg_1016) sans_(undertale) shorts siblings skeleton sneakers spot_color standing striped striped_pants traditional_media umbrella undead undertale water 1boy 2020s 2022 2d alternate_costume barefoot beach black_pants digital_media humanoid male male_only monster monster_boy ocean pants pink_slippers sakito_(mg_1016) sans_(undertale) scenery skeleton sky slippers solo striped striped_pants sunset undead undertale water white_stripes wide_shot 1boy 2020s 2022 2d blue_shorts cape dutch_angle gloves humanoid male male_only monster monster_boy papyrus_(undertale) red_cape red_gloves sakito_(mg_1016) shorts skeleton solo traditional_media undead undertale 2020s 2022 2boys 2d 3girls alphys anthro arm_around_neck black_pants blue_jacket blue_skin brothers cape digital_media female fish fish_girl floppy_ears fur furry furry_female glasses goat goat_ears goat_girl goat_horns hair horns humanoid jacket lizard lizard_girl long_hair male mammal monster monster_boy monster_girl multiple_boys multiple_girls one_eye_closed open_mouth pants papyrus_(undertale) pink_slippers ponytail red_cape red_hair reptile reptile_girl sakito_(mg_1016) sans_(undertale) scalie shorts siblings skeleton slippers striped striped_pants text toriel undead undertale undyne upper_teeth_only walking white_fur white_horns white_stripes yellow_skin 2020s 2022 2boys 2d artist_name black_background black_pants blue_jacket blue_shorts bone brothers cape copyright_name dark_background digital_media duo english_text foreshortening gloves holding holding_bone humanoid jacket looking_at_viewer male male_only monochrome monster monster_boy outstretched_arm pants papyrus_(undertale) red_cape red_gloves sakito_(mg_1016) sans_(undertale) shorts siblings simple_background skeleton striped striped_pants text undead undertale white_stripes