This is a list of all the alternative identities of Theodore throughout the TV Series and Movies.
- The Cruise - Dr. Watson
- Maids in Japan - Yum-Yum
- Cinderella? Cinderella! - Palace Messenger, Fairy Godmunk's assistant
- Chipmunk Vice - Officer Tub
- Sincerely Theodore - Alvin
- Dreamlighting - The Nose
- Elementary, My Dear Simon - Dr. Watson
- Treasure Island - Squire Trelawney
- Alvie's Angels - Ted Bumbley
- Alvin in Neverland - Mr. Smee
- Kong! - Kiki
- Batmunk - Happy
- Star Wreck: The Absolutely Final Frontier - Dr. Moamz McRoy
- Robomunk - Mr. Pinkie
- Chip Tracy - Kiddo
- Sploosh - Godfrey
- The Chipmunk Adventure - A native tribe's "Prince of Plenty"
- Alvin and the Chipmunks Meet the Wolfman - Werewolf puppy, Mr. Hyde
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