Every single custom character is seemingly randomly assigned 2 different special tricks.

After a lot of unsuccessful research on my end in an effort to discover what influences them, the sudden arrival of GreenPirateBird, the now current WR holder, has marked a point where we finally understand how they are determined. To much surprise, the special tricks you are given access to depends on your Custom Character's Name.

This game continues to be full of surprises with my WR trounced once more, I am eager to see what other secrets this game could still be hiding

The GBA version of the game is an entirely different game that shares pretty much none of the mechanics from what I understand. If you have interest in running the GBA game, I believe you'd need to make a page for that yourself (like I did for this game)