Jouji Kamamoto

A midget in a pink bear suit and is always seen sucking a pacifier and an 8-year-old boy. He rides around in a motor baby carriage and uses a Water Civilization deck, he is a skillful duelist and has even defeated Mimi (a powerful duelist in her own right) fairly easily. In Season 3, he uses a Darkness/Water deck, he also withdraws from the tournament after losing to Yu Fua.

(Source: Wikipedia)