I found out that whenever a bowling game is loading (black screen), that if you hold a direction on the D-pad, you get a certain coloured ball!
Here is the key:
up-blue
down-green
right-yellow
left-pink

I also noticed that once you beat Matt the master in boxing (He's also known as the boxing trainer), you get a pair of silver gloves.

Have you found anything?

EDIT: I also just found that if you hold 1 while pitching in baseball, you pitch underhand!

This message was edited by metaldra0 on Dec 31 2006.

put those in the cheats section.
When bowling move and turn all the way to the left or right and you can bowl in the wrong lane!
Also on power throwing at 91 pins hit the side, miss all pins, and they all explode (supposedly)

I was wrong, it is 2 you hold down to pitch underhand

Oh, ok. You only have to press 2, and it looks weird.

Coooooooo..ooooooool =D

quote Infinite Gravity

Coooooooo..ooooooool =D

And That's Spam ...But So Is This

Whilst it is fading from the 'Make sure no people or objects are around you because you might bump into them' screen to the screen where you can position yourself for tennis, hold down 2 and the court will become the blue practice court.