Get Guilmon and Renamon. When they digivolve to Mega level, they will be a strong team (Gallantmon and Sakuyamon).

There are eight partner Digimon you can get. They are Agumon, Patamon, Veemon, Guilmon, Renamon, Kumamon, Kotemon, and Monmon. After the first three you get, you will need to find the Ultimate level Digimon for the rookie that you want. DRI people are in various locations and they will tell you which Ultimate Digimon they want DNA from. Defeat the Ultimate level Digimon to get the DNA. Take it back to the DRI person that wants it and you will get that rookie. For example, talk to DRI person in Tyranno Valley. He wants DNA from MetalGreymon. Go to Bulk Swamp to find MetalGreymon. Fight and defeat him to get the DNA. Take it back to the DRI person and he will put Agumon in your team. Go to Digimon Lab or see Piximon to switch to Agumon.

You can get alternate forms to your Digimon's Rookie. The first will be at level 5. Champions seem to grow in levels faster than Rookies. Depending on your tolerances, you will get other forms as well.

Go to the Jungle Shrine in the Ether Jungle and keep fighting Numemon (Blue). You will get an easy 660 bits every time you defeat him.

Sometimes you can attack twice. One way is to get your opponent's health to the reds. The second method depends on your speed/movement.

Champion: Raise Rookie's level to 5 and it will have a Digivolution.

Ultimate: Raise Rookie's level to 20 and it will have a Digivoulition.

Note: Ultimate Digimon learn their Signature attacks from the show at level 70

When you are training your Digimon, quickly press Circle repeatedly and he should get it correct most of the time.

If you do not want to battle and just want to get to a save location, place your strongest Digimon in front. When you get to a battle, it will hopefully be strong enough to allow you to run away.

To get to Duel Island just go to Divermon's lake, and go down the ladder and walk up to the grey bit at the end. Press X or triangle or what ever you use to enter Submarinemon and swim untill you find a way out. (You will need the egg thingy that you use to get into the ground)

Defeat the Sieryu leader and go to East Station in Kicking Forest. Go to the machine and it will say that Guilmon possesses a Blue card. Go to Asuka City and enter the Inn. Go into the room full of beds and you will find Guilmon. Talk to him and he will say his cousin has a Blue card and he will be going somewhere to eat. Go to the Forest Inn, and beside the Guardromon you will see a Guilmon. Talk to him and he will say he is in Sieryu City. Go to the Sieryu Inn and talk to the Guilmon on the bed. He will give you a Blue card (which is a fake). Go to East Station to that machine, and it will tell you that it is fake. Return to Sieryu City and you will see a Guilmon on the streets. Talk to him and he will say that Guilmon is a trickster and that he likes to hide in spooky places. Go to the Forest Inn. Go to the bottom floor to find him. Talk to him and he will apologize and give you the Blue card. You can then go to the East Station and go to the South Sector.

At the very start of the game (when you get into the Digital World), you can purchase cards such as BKImperialdramon, Megagargomon, Seraphimon, and other very powerful cards from the Divermon in Asuka City. The only downside is they are 10,000 or more each.

When you go to the auctions at El Dorado always buy it if you have enough money. Sometimes they sell for five times as much.

At the very start of the game (when you get into the Digital World), you can purchase cards such as BKImperialdramon, Megagargomon, Seraphimon, and other very powerful cards from the Divermon in Asuka City. The only downside is they are 10,000 or more each.

Have the Digiegg Of Reliability and go to the Plug Cape. Then, go all the way to the top to a dock and go to the edge. A "!" will appear. Press X, then go left until you find an exit.

Tag in all your weaker partners first, then tag in your strongest last. Do not forget to heal them to get the experience. Then, finish with the strongest Digimon. All the digimon will get the same amount of experience.

There are some hidden Bosses in the Amaterasu server. Check all the areas that you fought other Bosses. For example, BK Imperialdramon will be where Mastertyrannomon was in the Azuka Server. Some Boss spots are (for both servers): TyrannoVally, Controlroom, Dum Dum Factory, Jungle Shrine, Sewers, and Jungle Grave entrance.

Once you defeat Gallacticmon, go to AM Wind Prairie and go to Amaterasu Seiryu city. Talk to him and afterwards he will not fight you. Instead, he will ask you to find the five Epic Items One of them can be found in the AM Wind Prairie. Go to the hole and go down. Follow each path until you get to the Armour Corp. Note: On the path you will have to fight Boss Digimon (as in BK Megagargomon to BK Kingnumemon) which are blocking the path

No matter what three Digimon you start out with, all of them can learn the same Digivolutions. The difference is with the requirements for the Digivolutions. For example, Omnimon is a very powerful Digimon, and is required to get another strong Digimon, Imperialdramon Paladin Mode. All eight Digimon can Digivolve into both Omnimon and Imperialdramon PM, but Agumon and Veemon can digivolve into the two easier because they are both a base digimon of Imperialdramon or Omnimon.

When using Snapping Claw, press Triangle when you see the hand clasp during the attack and have high wisdom. It works only on Digimon who carry items.

Press Triangle just as the enemy is about to hit you. They will miss about half of the time. If it does not work, your Digimon will need more defense and speed.

Once you get the egg that the Sazuka Leader tells you about, go to Divermon's Lake. Go down the ladder at the entrance of the lake. You will see Divermon in the water. Talk to him and he will give you a Divermon card. Go to the square platform and press Action. When you are in the water, keep going to the right. You will see light. Go to it and press X. You will go up and a message reading "Welcome To Dueling Island" will appear.