Completely unrelated to Wii/GC hacking! There is hacking involved though!
I made this in just under an hour. I'm aware a trainer exists already, this was merely for fun and experience.
Screen:
(http://i39.tinypic.com/fbhiqv.png)
To Do:
Infinite Ammo
Infinite Health/Shields
Sprint
Moon Jump
More?
Links:
0.10 - http://www.mediafire.com/?uc2mckw6a6r3898
Let me know if you try it and what you think. :)
Edit: Only works on "Halo" on Normal >__> I guess I gotta do some pointer work.