Most of Roo's life is unknown. However, in Piglet's Big Movie, it is revealed that Rabbit and Tigger replaced Roo with Piglet, allowing Roo to play wih Rabbit. During that time, Roo became bouncing friends with Tigger, even learning the Woop-Dee-Dooper-Loop-Dee-Looper-Alley-Ooper Bounce in The Tigger Movie.
He first appeared in The Many Adventures of Winnie the Pooh, commenting on Eeyore's tail with Kanga and Owl. He also appeared pulling Eeyore to pull Pooh out of Rabbit's front door. However, he was pulled away by Gopher with Eeyore's tail. He also watched Pooh and Piglet fly past their house and later gathered at Christopher Robin's House when the Hundred Acre Wood was flooded.
He bounced with Tigger up a tree one winter and got stuck up there until he jumped into Christopher Robin's coat. He played a major role in Pooh's Heffalump Movie, where he was left behind in the expedition to Heffalump Hollow, then venturing into Heffalump Hollow and meeting Lumpy, who became a good friend. However, Pooh, Piglet, Tigger and Rabbit didn't understand and attacked Lumpy until Kanga convinced Rabbit to let Roo explain. When Roo got into trouble, Lumpy called his mother and she rescued him. Roo also helped Lump overcome his fear of halloween in Pooh's Heffalump Halloween Movie.
- Roo is one of the only not to have a paralell counterpart.Roo dad was a general who died at war before he was born kangaroo doesn't like to talk about him