Evolution is a term on what they use. Eventually, Only Panty and Stocking Uses it along with Scanty and Kneesocks. But in one Episode, Bob unit 3 and 4 has a evolution (except they don't play with Socks and Underwears) that they threw arrows to other People in Green's Puppet Adventure. Frollo and Gaston had a Evolution also in the Frollo Show. It is used in Super Smash Bros X as Panty/Stockings evolution (censored due to having Pornigraphic Scenes)
Their evolution isn't like this one
- Gumball: Darwin.
- Darwin: Gumball
- Gumball: Lets Do this!
- They turn to their Moustache form
- Darwin: Oh Yeah!
- Darwin goes swimming and Shoots out the water
- Gumball Dives and Makes a Big Slash