Paper Mario cheats and cheat codes for Nintendo 64

Unlimited items from trees
If you get the a hammer, use it to hit trees. The trees will give 
for you first an endless supply of acorns that revive your 
FP by 3. Go to somewhere else to get different items.

Bowser questions - answers:
The answers are as follows: "3", "Red", "Red", "24".

Never-ending hallway pattern:
The pattern to the "Never-ending hallway" is the following:
up, down, up, down, down, up.