The Mask: Animated Series - Season 1 - Eps 15: Split Personality
The Mask breaks in half during Walter's attempt to retrieve it. Now both Stanley and the Mask are existing at the same time. Chet Bozzack, an old high school bully of Stanley, gets and puts on the other half of the mask.
About The Mask: Animated Series

Title: The Mask: Animated Series
First Air Date: 1995-08-12
Last Air Date: 1997-08-30
Status: Ended
Rating: 7.2/10 (from 491 votes)
Language: EN
Seasons: 3
Total Episodes: 54
Network: CBS Syndication
Genres: Family, Animation, Action & Adventure, Sci-Fi & Fantasy
Production Companies: New Line Television, Dark Horse Entertainment, Film Roman, Sunbow Productions
Synopsis
Insecure bank clerk Stanley Ipkiss uses an ancient mask to gain superpowers while taking on the mischievous and cartoonish, but heroic and good-hearted personality of The Mask
Cast

Rob Paulsen
Stanley Ipkiss / The Mask (voice)

Frank Welker
Milo voice)

Heidi Shannon
Peggy (voice)

Neil Ross
Lieutenant Kellaway (voice)

Jim Cummings
Detective Doyle (voice)

Mark L. Taylor
Charlie Schumaker (voice)