All 71 Canon Ben 10 Aliens (however Ben Prime only used 63 Aliens

Which Ben Was Ben Prime in Alien X-Tinction? [SPOILERS]

The Michigan Lake Triangle. Was it aliens? – The Midnight Train Podcast – Podcast – Podtail

Omnitrix, Ben 10 Wiki

Ben 10: Omniverse - Post-Canon Alien Designs for Ben Prime - by Derrick J. Wyatt (Updated 04-15-2021)

In Ben 10, which version of Ben 10,000 is Canon? The one from the original series, ultimate alien or omniverse? - Quora

How powerful is Kid Ben 10 (classic)? - Quora

Which Ben Was Ben Prime in Alien X-Tinction? [SPOILERS]

Most used aliens in Classic : r/Ben10

I always hated this change in Gwen's magic and I still do : r/Ben10

Which Ben Was Ben Prime in Alien X-Tinction? [SPOILERS]

Omnitrix, Ben 10 Wiki

say what you will about the reboot gimmicks. but at least there used in almost every episode of the season and each alien gets one. unlike the ultimates. : r/Ben10

Of the 63 Aliens that Ben possesses, only 12 have Ultimate forms. Do you think the Ultimate forms were misused? : r/Ben10

Omnitrix, Ben 10 Wiki