Board Thread:Speculation, Theories, and Rumors./@comment-679780-20131225233527/@comment-34518800-20160519221324

Mystic Monkey wrote:

Aidanthehedgehogisawesome wrote: What if all the characters swapped with their opposites?

Like the Underswap of Sonic. Whats an underswap? Underswap is an Undertale AU (alternate universe) where all the characters are swapped with their polar opposites.