Infinite items from trees:
 
Once you have received a hammer, use it
to hit trees. The tree by where you 
begin gives you an endless supply of 
acorns that revive your FP by 3. You 
must go somewhere else to get another
acorn, though (you can also get coins,
star pieces, and a weird doll as well).

by unknown


Unlimited eggs:

To get unlimited eggs, go to Mount 
Rugged, and search through the bushes. 
You can shake as soon as you get there.
In one of the bushes, an egg will appear.
Go up the mountain a little bit, then go 
back down and look in the same bush the
egg was in previously. Continue the 
process until you have an unlimited 
number of eggs.

Submitted by hotwheelz2 at hotmail.com