The New Adventures of Winnie the Pooh - Season 1 - Eps 35: The Old SwitcheRoo
Roo asks Tigger to keep him from having a bath, and the tiger recruits Piglet to switch places with Roo to trick Kanga. But when Roo and Tigger get excessively dirty, and Kanga pretends that she does not recognize Piglet, everyone realizes that their attempted "switcheroo" has gone too far.
About The New Adventures of Winnie the Pooh

Title: The New Adventures of Winnie the Pooh
First Air Date: 1988-09-10
Last Air Date: 1991-10-07
Status: Ended
Rating: 7.7/10 (from 238 votes)
Language: EN
Seasons: 5
Total Episodes: 82
Network: ABC
Genres: Family, Animation, Comedy, Kids
Production Companies: Disney Television Animation
Synopsis
An American animated children's television series inspired by A. A. Milne's Winnie-the-Pooh stories.
Cast

John Fiedler
Piglet (voice)

Jim Cummings
Winnie-the-Pooh / Tigger (voice)

Ken Sansom
Rabbit (voice)

Peter Cullen
Eeyore (voice)

Hal Smith
Owl (voice)

Patricia Parris
Kanga (voice)

Michael Gough
Gopher (voice)

Nicholas Melody
Roo (voice)