Barkio from 101 Dalmatians: The series, from the episode Virtual Lucky
In the episode Lucky, Rolly and Cadpig get stock in a video game, in the final level they all fuse into a cerberus dog
Prompt: barkio dalmatian, solo, dog, cerberus, 3 heads, dalmatian, white fur with black spots, black nose, tail, left_head_white_sclera_blue_pupils_mole_white_ear_blue_collar, center_head_blue_sclera_black_pupils_black_ears_red_collar, right_head_white_sclera_black_pupils_white_ear_with_spots_blue_collar