Theorinverse

Requests go on the first part!
This is a multiverse that is a mixture of many theories, facts and fiction that I collected to make one story!
The title of the multiverse is an abomination of the words: 'theory' and 'fiction'

The main characters include Canvas!Sans from a lil' spoopy AU I concocted, as well as ERROR, I may make Dice/Poker relevant if yall wish.