Evolve meter always full
At the title screen quickly press Square, Right, X, Triangle, Left, Circle, L1 + R1. A sound will verify proper entry.

BlackAgumon
Beat BlackAgumon when you are in single player mode when he surprise attacks you. He can digivolve into BackGreymon and BlackWarGreymon.

One-hit kills
At the title screen quickly press Right, Up, Left, Down, X, L1 + R1. A sound will verify proper entry.

Evolve energy item
At the title screen quickly press Triangle, Right, Down, Circle, L1, X, R1, X, Triangle. A sound will verify proper entry.

Diaboramon
Beat Diaboramon when you are in single player mode. He is the Boss fourth to the top and cannot digivolve.

Duskmon
Beat Duskmon when you are in single player mode. He is the Boss second to the top and cannot digivolve.

BlackGabumon
Beat BlackGabumon when you are in single player mode when he attacks you. He can digivolve into BlackGarurumon and BlackMetalGarurumon.

BlackGuilmon
Beat BlackGuilmon when you are in single player mode when he attacks you. He can digivolve into BlackGrowlmon and ChaosGallantmon.

Omnimon
Beat Omnimon when you are in single player mode. He is the boss third to the top and cannot digivolve.

Chaos Wasteland stage
When you are In single player mode, beat any of these Digimon to access it: Duskmon, Diaboramon, Omnimon, MaloMyotismon, or Neemon.

Ice Palace stage
In single player mode, make your way to the Boss on the bottom. Beat them to access the stage.

MaloMyotismon
Beat MaloMyotismon when you are in single player mode. He is the boss on the top and cannot digivolve.

Neemon
Beat Neemon when you are in single player mode. He is the boss fifth to the top and cannot digivolve.

Hints & Tips

Ultras
When you are at the highest level form of Digimon or the Digimon cannot Digivolve, you can perform a Special Attack, called an "Ultra".

Diaboromon: Digi-devolve another surrounding opponent to the lowest level.

MaloMyotismon: Randomize the other player's control (for example, Circle to X, X to something else, something to L1, and so on.)

Bonus attack
When you attain your most powerful form, you can have your bonus attack available. Just hold L and "Special Attack" to prepare it, then release. You should unleash a really powerful attack.

Angewomon: Heel of Justice
Blackmetalgarurumon: Giga Destruction
Blackwargreymon: War Blaster
Burninggreymon: Burning Grey Blaster
Chaosgallantmon: Shield Attack
Diaboromon: Virus Download
Duskmon: Geist Blade
Duskmon: Geist Blade
Gallantmon: Shield Attack (Final Purification)
Garudamon: Garudapunch
Lilymon: Sun Crescent Kick
Magnaangemon: Excali-burst
Malomyotismon: Crimson mist
Megakabuterimon: Rhyno Charge
Metalgarurumon: Giga Missile
Neemon: Gassed Off
Omnimon: Transcendent Sword
Wargreymon: War Driver
Zudomon: Anvil Smash