Mammoth Mutt is a pink-haired chihuahua. She can inflate and expand herself to enormous proportions. Mammoth Mutt is a Chihuahua with bubble gum pink fur, big blue eyes with long eyelashes, cream-colored ear innards, muzzle and tummy, a small thin tail, bangs, large pointed ears, a small black nose, and a white dog collar with a red, hearted-shaped tag. When she activates her power, she becomes gigantic and ball-shaped, with her small head, legs and tail protruding from her enormous body.