Select three different Robopon at start
To choose three different Robopon at the beginning of the game you first have to get the Secret Cave Key from Nick and the Ion Battery from the dog in one of the houses. Then, go to the back of the house where you started from. Move left until you see a door. It will now open. Go in to get two batteries. The first can be found by going up and to the right, then down to find the Moon Battery. The other one is hidden. When you enter, go straight up and it will be a dead end. Move across the right wall and you will walk through it. It may take awhile to find the entrance. When you go through the passage, you will find a chest with the Sun Battery. You can now spark the Sun and Moon Battery to get Hexbot, Spark Ion, and Moon Batteries to get Sun-Zero, or Spark Sun and Ion to get Scooter.
Ice*
Go back 20 years. At Downtown Delica, go into the castle then to the jail. Go to the last door and you should see Draco. Fight him. They all should be at level 60 .If you want to win quickly, Virus all of them. Once you win, you should get Ice*.
Musashi
This Robopon packs a powerful punch. He is a legendary little warrior who is almost as strong as SunZero. To get him, spark a Cyber Battery and an Ultra Battery.
Negapon
Once you unlock Marvel Lab, enter it. Make sure you have room for at least one more Robopon. You should see a building directly in front of you. Go to the left of that building. Once there you should see a dog. Talk to it. It will tell you to input a password. Enter "9". The dog should give you Negapon. Negapon is very powerful. It turns into NegponX and Gatspon.
Rock*
Get a red mushroom and save the game in front of the mushroom shop. Turn in the red mushroom. If he does not give you the red princess, turn off the game and try again. Once you get the red princess, go to My Tower. You should see a red door. The princess should open it. Open the treasure chest and you should get Rock*.
Wind*
Unlock Playland then talk to a fat man behind the training spot there. Then, go to were Ms. Rocket is and pay him lots of money that so he can build a spaceship. Note: It takes about ten times to make the ship Fly.
Hint: Jasper's password:
After you earn Marvel Lab, go there but do not enter the building. Instead, go to the left side of the building and talk the dog. He will ask you for a password. The following passwords are to get Robopon. You must have space in your party to place that Robopon.
D: Icarun
H: B-cell
J: Gundarn
L: Under
R: Sherry
P: Fencer
S: Flicker
9: Negapon
Rvnge: Dorapon
Note: All of these Robopon start at level 1.
Easy wins
This is a fast way to defeat Doctor Zero and Zero at the end of the game. Equip Ray 2 Or Ray 3. Your Robopon should know Virus. Virus your opponent. If they have a high attack power, they will destroy each other. Virus all your opponents' Robopon. This is quick way to complete the game.
Easy experience points
Unlock the Marvel lab and train there.