Captain Planet and the Planeteers - Season 2 - Eps 19: Losing Game
The Planeteers return to Kwame's homeland, Africa, to investigate strange happenings with cattle that was reported by his long-time friend and brother figure, Dr. Mabutu. Little do they know, Dr. Blight is there, scheming to convince a tribe leader (also a friend of Mabutu) to allow the injection of a serum that turns bulls into super steers in order to resolve their meat supply woes. Not only does this threaten the condition of the land, via excessive grazing, but the serum causes awkward side effects, which eventually does wear off. The Planeteers, with a hand from Captain Planet, manage to rid the land of Blight and MAL.
About Captain Planet and the Planeteers

Title: Captain Planet and the Planeteers
First Air Date: 1990-09-15
Last Air Date: 1996-05-11
Status: Ended
Rating: 6.763/10 (from 217 votes)
Language: EN
Seasons: 7
Total Episodes: 113
Network: TBS Syndication
Genres: Animation, Action & Adventure, Sci-Fi & Fantasy, Kids
Production Companies: Turner Program Services, DiC Entertainment, Hanna-Barbera Productions, TBS Productions
Synopsis
Eco-villains beware: Captain Planet is here to save the day! With the guidance of Gaia, five Planeteers - representing Earth, Fire, Water, Wind and Heart - come together to defend our planet from environmental destruction. With their powers combined, the team becomes the solution to pollution!
Cast

Joey Dedio
Wheeler (voice)

LeVar Burton
Kwame (voice)

Kath Soucie
Linka (voice)

Scott Menville
Ma-Ti (voice)

Janice Kawaye
Gi (voice)

David Coburn
Captain Planet (voice)