Watch Nickelodeon Guts full episodes online.
Synopsis: Three kids dawning the different colors blue, red, and purple compete in relatively cool-looking olympic-style games to achieve as many points as they can. At the end of every episode, they climb a big fake mountain, braving tumbling rocks made out of styrofoam, sparkling glitter, shooting steam, and loud sounds while trying to hit all the "Actuators" along their way to the summit including the final one at the very top. The first place winner gets a "piece of the rock" which is a big green glowing rock-shaped thing, that is supposed to be from the mountain they just climbed. The mountain is called the "Aggro Crag" later changed to the "Mega Crag" during the 3rd season, and finally the "Super Aggro Crag" for Global GUTS.
More info: IMDB, Wikipedia