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sans_(undertale) shorts skeleton smile solo teeth undertale 1boy attack battle black_shorts blue_eyes blue_jacket bone fighting_stance gasterblaster gloves glowing glowing_eye glowing_eyes grin hallway hollow_eyes jacket korokor59513559 male_focus sans_(undertale) shorts skeleton smile solo standing teeth undertale white_gloves 1boy black_shorts blue_jacket gasterblaster gloves grin hood jacket male_focus pink_slippers running sakekuzu_no_ame sans_(undertale) shorts simple_background skeleton slippers smile solo teeth undertale white_background white_eyes white_gloves 1boy 2018 2d artist_logo battle black_background bone boots dark_background digital_media flaming_eye full_body gasterblaster gloves glowing glowing_eye hand_on_face hand_on_own_face hand_over_eye holding holding_bone humanoid male male_only monster monster_boy papyrus_(undertale) red_boots red_gloves red_scarf scarf simple_background skeleton skull solo undead undertale vauvenal 2016 2boys 2d artist_name black_shorts 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holding_knife holding_weapon jacket knife running sans_(undertale) shoes short_hair shorts skull slippers smile sweater teeth undertale weapon