"Scaler (also known as Scaler: The Shapeshifting Chameleon) is a video game released in 2004 by Take-Two Interactive and Global Star Software for the GameCube, Xbox, and PlayStation 2 video game consoles.

Scaler follows the story of a 12-year-old boy named Bobby Jenkins who stumbles across the evil plot of his next door neighbor to dominate the world through use of mutated lizards. His neighbor, Looger, captures and restrains Bobby, striking him with a bolt of energy that transforms him into a shape-shifting alter-ego, Scaler -- a vivid blue and yellow mutant lizard with razor sharp claws, a long tongue, and the ability to shift into several other kinds of lizards.

Unbeknownst to Scaler, Looger controls a network of unstable portals that are the only connections between the different dimensions in the multiverse. Any being in control of these portals would have the ability to move freely between the different worlds, and even capture them. Looger has managed to accomplish this through the use of a device created by a scientist named Leon, who was consequently exiled through a portal to a desolate world. With the portal being his only escape route, Bobby "Scaler" Jenkins escapes from Looger through the portal and must now travel the strange world he arrives upon in his new form in order to find and defeat Looger or all of the universes will go into darkness."
-Wikipedia