Episode #24 of the 1980-1982 shorts.
Bizarro attacks the SuperFriends by turning them into Bizarro-Superheroes that think like him. He also exposes Superman to Red Kryptonite, which causes him to grow extra arms and legs. Superman manages to stop Bizarro by exposing him to Blue Kryptonite.

More Saturday Morning Cartoon fun with the SuperFriends in Warpland: When Superman and Batman try to stop a meteor from hitting Metropolis, they are pulled into another dimension and turned into animals. Superman and Batman must fight the dimension’s animal residents and find some way of returning to normal.

Remember when Saturday morning was about the only time you could watch cartoons. weekday cartoons didn’t really appear until the early to mid-80’s. Now you can see cartoons 24-7 on 5 or 6 channels. Odds are, none of them are as good as the Superfriends.