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

Ben Tennyson with his Omnitrix in Dimension 82 : r/Ben10

Gwen Tennyson, Ben 10 Wiki

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

Christmas Special: Trying to decipher how many Ben has (probably failing) : r/Ben10

Gwen Tennyson, Ben 10 Wiki

Why doesn't Ben use his original 10 aliens in Omniverse at all? - Quora

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

Who will win, Composite Albedo (Ben 10) or Goku Black? - Quora

Ben 23 edits are back with non canon aliens now : r/Ben10

Ben Prime ''Semi-Canon'' Aliens : r/Ben10

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