Digimon World 4 - Platform: Playstation 1

Unlimited Items and bits:
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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

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

Easy experience:
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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. Additionally, go to 
Death Valley, then to the Fortress. When you are inside the guard room, defeat everyone 
for 32 experience points per kill. After all the doors open, go outside and enter the 
fortress again. This must be done two or three times to reach the next level.

Easy tech ups:
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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.

Agumon:
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Reach level 16 with Guilmon.

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

Defeating Aprokrimon:
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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.

Dorumon:
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Reach level 16 with Agumon.

Guilmon:
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Reach level 16 with Veemon.

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

Veemon:
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Reach level 16 with Dorumon.

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

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