Re: What is Munchkin?
Interestingly, the show never showed how the heroes themselves turned off the transformation, but the villain, after finding a piece of one hero's "civvies" and discovering that it in fact did turn into part of her uniform, came up with a device to forcibly transform them back!
There was also an episode of the show where one member of the team lost his bracelet and didn't know it until he tried to transform.
It sorta-kinda feels like OIHID since the transformation usually involves an verbal activation ("Bird Go!" or "Transmute!" for those of us who remember Battle of the Planets), and probably could be treated as such for most game situations.