In Season 1, Ben starts off with 10 of his previous heroes. Later, he begins to re-unlock many of his previous aliens. About mid-way through season 2, Ben gains access to all of his previous aliens that he has turned into.
Original Aliens[]
- Goop
- Heatblast
- Ultimate Echo Echo
- Humungousaur
- Way Big
- Grey Matter
November's Featured Series
- Nightmare
- Chromastone
- Diamondhead
- Wildmutt
- Cannonbolt
Re-unlocked Aliens[]
- Name (episode unlocked in)
- Four Arms (We Are the Champions)
- Terraspin (Repunzel)
- Muscle Man (It Came From the Omnitrix) - Main series: Ben 10: Aliens Unleashed
- Swampfire (Tiki Island)
Additionals[]
- Smallarge (In Season 3)
- Georock (The Sweet Smell of Stink)