In the Wii version of Rocket Rodeo you can shake the Wii Remote really hard to make Patrick perform a series of animations on top of the rocket, and every time he does this the color of the rocket's flames change from the standard orange to blue, green, purple, green again (or turquoise?), and back to orange in this order.
The racing vehicles in the Wii version run slightly faster compared to the PlayStation 2 and GameCube versions, most likely in an attempt to make the races easier to compensate for the motion controls.
Oddly, this model is only used during the platforming sections of Diesel Dreaming and Alaskan Belly Trouble, the other levels all use the same standard model used in the PS2 and GameCube versions.
Localstrings_savetext has a few interesting things, including placeholder license text and a possible hint there was going to be an Xbox version. Localstrings_credits has a short log of things that were added to the game.