Miyamoto Usagi

Miyamoto Usagi is a character created by Stan Sakai. He first appeared in Albedo magazine, but was popular enough to start his own series, Usagi Yojimbo. On occasion, Usagi has appeared in cross-overs with the Teenage Mutant Ninja Turtles.

1987 Cartoon
In the 1987 series, Usagi was mistakenly called Usagi Yojimbo, which is the title of the comic rather than the name of the character.

Usagi first appeared when Donatello's interdimensional device malfunctioned due to interference from The Shredder's device. Upon entering the Turtle's dimension, Usagi assumed that the Turtles were Turtle Guards sent to attack him. Luckily, Michelangelo was able to subdue him. They decide that Usagi should be returned to his home and that he should stay with the Turtles until they can transport him back.

Usagi helped the Turtles find the source of the disruption. After fighting some Foot Ninja, Usagi wandered into a rabbit-themed restaurant where he was mistaken for a waiter. Shortly after, he decided to "liberate" his "enslaved brothers."

After his rebellion, Michelangelo found him and took him to the rest of the group. When Baby-San was hatched, Usagi was part of the group that found Obento. Usagi was the one to place the Blue Flame of Osaka in the dragon's mouth, causing him to return to his egg. Afterwards, Obento agreed to care for Usagi until he could return home.