Ben 10: Omniverse 2 (Wii U)

CheatingDome.com

Aliens

Meet the following requirements to unlock new Aliens.

AlienHow to unlock
AerodactyleComplete Level 2: Mess Hall Mashup.
Big ChillComplete Level 3: Welcome to Erf.
BullfragComplete Level 2: Mess Hall Mashup.
CannonboltComplete Level 5: Core of the Problem.
GravattackComplete Level 4: Underground and Beyond.
SwampfireComplete Level 1: Stow Away.
XLR8Complete Level 4: Underground and Beyond.

Arena challenges

Complete the indicated task to unlock the corresponding challenge.

Arena challengeHow to unlock
AttritionCollect the Arena Token in Level 2: Mess Hall Mashup.
Big HitsCollect the Arena Token in Level 4: Undertown and Beyond.
MagnetCollect the Arena Token in Level 1: Stow Away.
MalfunctionCollect the Arena Token in Level 5: Core of the Problem.
No Time for HeathCollect the Arena Token in Level 3: Welcome to Erf.
Sale on TurretsCollect the Arena Token in Level 6: No Time for Sightseeing.

Cheat Codes

Select "Promotions" at the "Extras" menu, then enter one of the following codes.

Upgraded Gravattac
Enter Feedback, Fourarms, Diamondhead, Bloxx as a code.

Upgraded Wildvine
Enter Gravattack, Eye Guy, Arctiguana, Wildmutt as a code.

Upgraded XLR8
Enter Shocksquatch, Gravattack, Arctiguana, Diamondhead as a code.