Pochacco is drawn as a white dog with black floppy ears, but no visible mouth. He is often dressed in athletic attire, as he has a sporty and playful personality. He is a vegetarian, he loves carrots, but his favorite food is banana ice cream. Pochacco is a curious and clumsy little guy who sometimes sticks his nose in where it isn't wanted. Like most dogs, Pochacco loves going for walks.

Pochacco's name means "pocha pocha" (chubby). Pochacco was born on February 29, 1989 (a leap year) in Fuwafuwa Town. Pochacco can't walk straight. Even when he tries, he keeps tottering from side to side. He can walk on two legs, but he trips up and falls over every now and then. Pochacco loves spring. In fact, one of his favorite flowers is a pink flower called "rengeso". Pochacco's dream is to fill his tummy with banana ice cream (so he likes summer too). Although Pochacco has a lot of animal friends, recently he has been hanging out with Choppy the mouse, his best friend.