The New Adventures of Winnie the Pooh (1988)

Season 2: Episode 3

Sick of his friends ruining his garden while they are playing pirate, Rabbit gives them a fake treasure map "drawn from his great-great-great uncle and the greastest rabbit pirate ever, Long John Cottontail" that leads them to a chest full of rocks. When he becomes worried that his friends will hate him for deceiving them, he tries to get the chest back before they open it.