VGFacts

In the Skylanders Games, Pop Fizz's Beast Form is a reference to Rampage, why you ask? I'll tell you. You see whenever Pop Fizz drinks his potion or what he refers in the Giants trailer as "soda" he transforms into a Beast with sharp claws and a more monstrous personality, in the Rampage Total Destruction Intro a boy named George drinks Scum Soda and transforms into a giant ape. Pop Fizz's Beast Form has eyes nearly identical to the Rampage World Tour Monsters. Don't believe me? Here's some proof.

Pop Fizz
http://img1.wikia.nocookie.net/__cb20130..._Promo.jpg
Rampage
http://upload.wikimedia.org/wikipedia/en..._Cover.jpg
Giants Trailer
(1:38) http://www.youtube.com/watch?v=DUMFF7ekbvw
Rampage TD Intro
(Starts at 0:31) http://www.youtube.com/watch?v=IVaa81HlD5k