While playing a game, enter Circle, X, X, Circle, Triangle, L1, Square, R1, L1.
Appearing and disappearing hay barrels
Play the first level. When you get to Gloria's Pad, kick open the left gate. Destroy the hay barrels in the Penguins' Pool then go back to Gloria's Pad. Look through the left gate and the hay barrels will be there. Go back to the Penguins' Pool and they will be gone.
Armor madness mini-game
On the first level when you get to the bit where you race as Gloria finish the race first then go back to wear you bashed those hay stacks and to your right there should be three bashed-up popcorn machines opposite that there should be a little hut kick the door down then in front of you there is a green game machine walk to it wait for a sign pops up saying circle talk/use and press circle.
Banquet
Goto the main lemur that is on the drum where all the food lies. Talk to him 10 times in a row to earn food. This can only be done 2 times.
Defeating leader Foosa
When you are facing the leader Foosa at the very end when you are on a platform with spikes around you, he will first make the back catch on fire then start chasing you. He will get tired and give you a chance to hit him. After that, he will blow green air at you. Keep jumping. He will then go to the other side of the platform and start to give the vultures a signal to attack. Keep roaring at them. This process will repeat until the leader Foosa's life meter goes out. Sometimes the penguins will drop mangos.
Easy coins
Get 30 coins, then go to the Zoovenir Shop. Buy the Coin Magnet, which will make nearby coins come to you. In level 3 as Gloria (the hippo), hit thirty cars to get 15 coins. Note: this only works once.
Flying Bird Mini-game
When you are in level 3, go into the right subway entrance to find one of the arcade games.
Invincibility
Press Up, Down, X(2), R1, L1, R2, L2, Triangle, Square, Circle during game play.
Level select
Press R1(2), Circle, L2, L1, X, Triangle, R1, Triangle during game play.
Police
When taking on the police you can use the statues, manholes, cages, and carts.
Sticking Points
On the level Jungle Banquet, the mini game Find the Flowers the black flowers are on a step of the cave thing behind the hole. On the level Save the Lemurs where you go on the Perfectly Safe Trail with Alex you need to go ahead and kill the foosa before the lemurs come.
Unlimited Items and bits
This trick requires your main Digimon as player one and any Digimon as player two. Give all your Bits to player two. Then, save player two at the Save Keeper. Next, have player two give all Bits to player one. After that, have player two quit the game at the Save Keeper, but this time without saving. Then, go to Call Keeper and have player two join in again with the same Digimon. Repeat this from the beginning until you have 9,999,999 bits, both in the bank and pocket. You can also use this trick to duplicate items. This is very useful if you want to give some rare weapons and armor to a friend.