Reach level 16 with Guilmon.

Successfully complete the Undead Yard quest with Veemon or the Item Road quest with Dorumon.

First, destroy the five spike balls on the posts around him, avoiding the fire shots and wind blow. Whenever five flying things come to attack, just block. Do not try to jump on the area that he is on, as you will get shocked. After the spike balls are destroyed, he will shoot a purple attack that follows you. You must run around trying to hit him without getting hit. Magic and a gun weapon work well; you do not have to walk up to him, but they do smaller damage. Physical attacks are more powerful, but you must risk getting close to him.

Reach level 16 with Agumon.

The game states that Double Axe (all types) is a bash skill weapon. However, when you use it you will gain the blunt skill.

In single player mode, repeat the tutorial about fifteen times then go to Death Valley. Once there, follow a path and fight some Goburimon. Do not go across the bridge. Follow the path up and fight the Goburimon. They will give 10 experience points each. Break, then get the Gate Chip, use it, and repeat.

After you have unlocked the "Fortress" in Death Valley, whenever you need to equip a new weapon that is too high in tech points, just return to the Fortress and fight up and down the tower multiple times. You will receive between 10 to 60 tech ups in one revolution.

Reach level 16 with Veemon.

Successfully complete the Undead Yard quest with Guilmon or the Item Road quest with Agumon.

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. Note: 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.

Reach level 16 with Dorumon.

Successfully complete the Undead Yard quest with Agumon or the Item Road quest with Guilmon.

Successfully complete the Undead Yard quest with Dorumon or the Item Road quest with Veemon.