The world of Villains Victorious is the Disney equivalant of the Dark Multiverse.
This explains things like the wildly varying levels of technology, or how characters from such disparate time periods could exist simultaineously. This place is just one big melting pot of worse case scenarios. The entire premise of Disney Villains Victorious was just in the imagination of some insane Disney hater.
Some violent toxic Disney hater hated the concept of "Good always triumph over Evil" so much that he didn't like the villains in Disney's animated canon always being defeated by the heroes, so he makes fanfic versions of the animated canon movies with villains winning over the heroes instead. This is the result.