Genderbent Versions are versions of a character that are the opposite gender. They live in the alternate universe along with Alternate Universe Characters, however they usually are on the "genderbender side" of the universe.
What makes a genderbent version
Genderbent versions usually also have the opposite personality. If a female Charizard likes princesses and horses and loves pink, it's genderbent version would be male, like blood and wolves, and love black.