Pookie
Pookie is the name of Roy's pet rabbit in Nintendo Comics System comics published by Valiant.
Pookie's only appearance in the comic series was the issue Bowser Knows Best. Pookie can be seen on the first page of the comic, while the Koopalings are deciding what to get their father Bowser for Father's Day he can be seen in a small cage cowering from Roy who suggests perhaps simply beating Pooky would be suitable present for Bowser.
Roy ends up dropping the cage, which breaks when Wendy drags him away to help them capture the princess. Pookie can be seen in the backround of a few pages after this.
Pookie later appears on the last page of the issue also, while Bowser is distracted reading a (poorly made) Father's Day card from Lemmy Pookie manages to escape by jumping out a window and disappearing into the night.