My Friends Tigger & Pooh - Season 1 - Eps 52: Doggone Buster
When Darby briefly leaves Buster alone, he ends up joining Roo and Lumpy on an adventure to their fort. Since they didn't tell anyone where they were going, Darby ends up thinking that Buster is lost. The Super Sleuths are soon on the case, trying to track down just where the little dog has gone.
About My Friends Tigger & Pooh

Title: My Friends Tigger & Pooh
First Air Date: 2007-05-12
Last Air Date: 2010-10-09
Status: Ended
Rating: 6.8/10 (from 20 votes)
Language: EN
Seasons: 3
Total Episodes: 130
Network: Disney Channel
Genres: Kids, Animation, Drama, Mystery, Action & Adventure
Production Companies: Disney Television Animation
Synopsis
Pooh, Tigger, and friends from the Hundred Acre Wood welcome new neighbors — an adorable six-year-old girl named Darby and her puppy, Buster. With the help of adventurous super sleuths Tigger and Pooh, every episode revolves around the solving of a mystery and an interactive curriculum that encourages viewers to help them out.
Cast

Chloë Grace Moretz
Darby (voice)

Dee Bradley Baker
Buster (voice)

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

Travis Oates
Piglet (voice)

Peter Cullen
Eeyore (voice)

Kath Soucie
Kanga (voice)

Ken Sansom
Rabbit (voice)

Max Burkholder
Roo (voice)

Kyle Stanger
Lumpy (voice)

Tara Strong
Porcupine (voice)