He's the son of Kurojaki. The collie Wilson captures him and throws in off a cliff as a revenge for Kurojaki killing his familly, but the pup is saved by Cross. After Kurojaki's death he is taken by Ou dogs and he goes under Moss's care. When Cross gives borth to her pups, Chibi stays with them.
In Ginga Densetsu Weed he is named tesshin and is an adult ninja dog who lives in a Koga village. He was taught Zetsu Ternou Battouga and was meant to be the leader of Ou after Gin's death in case he doesn't have any heir. He teaches Weed the Battouga, but he refuses to go with him against Hougen. However, he is presuaded to go by an elder dog Chouroru. Tesshin leaves to save Gin from Hougen's prison. He defeats Genba and damages his brain.