In-game reset (Japanese version):
Hold L1 + L2 + R1 + R2 + Start + Select during game play.

Enemy conversion:
When being chased by an enemy, to convert them to another species with a different habitat, lead it into another atmosphere. For example, in Carmathen, an enemy in the plains can be converted into a Swamp creature if you lead it to the swampland.

Have Baby run through doors:
Walk out a door, and do not move. Immediately have Baby fetch, and he will run straight through the door, into the house, and come out.

Attacking Ringsider:
If you have Ringsider the toy, go into battle, use him, and start attacking him. He will say things such as "Knight, take it easy big fella'!". When he is killed, he says something like "Nice talking to you people! I gotta go now!".

Parent's unusual phrasing:
Before you talk to the man with the newborn baby in Junga, save the game. Then, speak with him. He will ask what his boy's name should be. Name him anything, and pay attention to what the man says after he repeats the name. Turn off the game, reload the save, and name the child something to fit the sentence to where it looks as if the man has just said a comment not dealing with the created name. Rather than, " is such a nice name for my son!", name the child "It" and he will say "It is such a nice name for my son!".