Digimon World 4 Cheats

Easy tech ups
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
Reach level 16 with Guilmon.

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

Defeating Aprokrimon
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
Reach level 16 with Agumon.

Guilmon
Reach level 16 with Veemon.

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

Veemon
Reach level 16 with Dorumon.

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

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

Easy MP Training
Below are two great techniques for MP training in the game:

Blast/Force (enemy): Head over to the Dry Land Station X (where there are four X Virus towers). These towers sit at the bottom of an amphitheater-like area, and around them spawn small scorpion enemies. Lure these enemies in the lower pit nearby and stand above them. From a heightened position, these enemies can’t successfully attack you, and you can reach them with all sorts of attacks (such as Fire, Bolt, or Ice). If you are using a Force Tech like Bind or Sleep, stand at the edge of the heightened area to reach the enemies. The enemy scorpions respawn indefinitely as long as you reenter and then exit again from the Virus Lab.
Heal/Force (allies): Head to a purple or yellow healing spot to easily recover lost MP as you train with the Heal Tech and the Force Tech (such as with Resist and Speed). If you’ve yet to unlock the aforementioned Dry Land area in Station X, there is a purple station before Doom Dome that can be used. If Dry Land is unlocked, however, consider heading to the Ancient Ruins, where a yellow station can be found on the very first floor.