Ben 10 Alien Worlds, Where do all the aliens come from?

Ben 10: Destroy All Aliens, Ben 10 Wiki

Omnitrix (Object) - Giant Bomb

Ben 10 (2005) All Aliens name,species and their home planet . - video Dailymotion

Alien X-Tinction, Ben 10 Wiki

Ben 10: Alien Worlds, Meet The Aliens

Does anyone know where these fan made aliens come from, I can't find them for the life of me and all I really know is that they are called the banned aliens

Alien World Short: Enemies Unite, Ben 10

What are some aliens you think should be from the same planet? : r/Ben10

Cannonbolt's Alien World: Episode 6, Ben 10