| Radioactive Ape|
| Animal Information
Radioactive Ape, real name Grrk-Grrk, is an ape superhero in a parallel universe to Radioactive Man.
When Radioactive Man was nowhere to be found, Fallout Boy called up Radioactive Ape's universe to ask if Radioactive Man was there.
Radioactive Ape was one of the superheroes who came through the energy rift above Zenith City. He said that he was in his tribal throne room when he was enveloped by an energy field and brought to Radioctive Man's universe. He and the other superheroes who got pulled through teamed up with the Superior Squad to solve the issue of the energy field. They traveled through to a negative universe where they fought against Nega-Pneumatica, eventually defeating her. After going back to Radioactive Man's universe, they found that it was all a trick using holograms and other technology and that they got brought to Radioactive Man's universe by Dr. Broome's Trans-Spatial Stairclimber. Radioactive Ape then used the Stairclimber to go home.