Ben 10 Jr. - Ultimate Alien

Summary
Ben 10000 had a son with Julie Yamamoto, and his name is Ben Jr., who at 16 won the Alfhatrix of his father with the help of Azmuth and now fights the forces of evil along with his father.

The 10 First Aliens from Alfhatrix
Alien X

Big Chill

Brainstorm

Chromastone

Goop

Humongousaur

Jetray

Sonic

Spidermonkey

Swampfire (Later renamed Swampflame)

Additional Forms
Magnetude, Frost and Multi-Alien - Unlocked in "My Birthday" by Azmuth

Beast - Unlocked in "Meet Albedo"

Lodestar - Unlocked in "Energy of Ultimatrix, again" by Ben 10000

Villans
Boulder (First appearance in My Birthday)

Farcleam (First appearance in My Birthday)

Albedo (First appearance in Meet Albedo)(Only in this episode, then it turns into an ally)

Kevin Levin (First appearance in Energy of Ultimatrix, again)

Argit (First appearance in Energy of Ultimatrix, again)

Sight (First appearance in Energy of Ultimatrix, again)(Captured and returned to Null Void in the same episode)

Season 1
 1 - My Birthday

2 - Meet Albedo

3 - Energy of Ultimatrix, again

4 - I Love You