Ben 10 Alien Force: All Aliens' First Appearances

Alien X, Ben 10 List Wiki

Part 2 of my auntie naming Ben10 aliens. this time, Alien Force : r/Ben10

Ben 10: Destroy All Aliens - Wikipedia

The First 10 Aliens in Ben 10: Alien Force - ReelRundown

Ben 10: Alien Force - Alien X First Appearance by dlee1293847 on DeviantArt

Ben 10 - Wikipedia

Ultimate Forms, Ben 10 Wiki

So, out of the 5 Ben 10 Series, which one do you think added the best alliens to the Omnitrix arsenal ? : r/Ben10

EVERY NEW ALIEN TRANSFORMATIONS IN ALIEN FORCE

Ben Tennyson, Ben 10 Wiki

Way Big Ben10Hero

Ben 10: Interesting Aliens in the Franchise 2.0 - HubPages

The First 10 Aliens in Ben 10 - ReelRundown

ben 10 pt 3 - flashbacks - alien force aliens by mundoautista2018 on DeviantArt

So wouldn't it be neat if they use the subspecies concept on Other aliens? Since all of them clearly look different on there first appearance : r/Ben10