Custom Robo Arena Cheats

Unlockable Reacquire the Ray MkII
To reacquire the Ray MkII after losing it, defeat the Robo Cup and then go speak to your character’s father at Neobrain, Inc. Upon talking to him, he will hand back the Ray MkII.

Unlockable Doppelganger Goods
After successfully completing twelve grudge matches, a doppelganger of your character will appear in front of your team's clubhouse, looking almost exactly like your main character. You'll be forced to fight him. Defeat him to accomplish the following.

Defeating him the first time will net you the Majel Robo, the Indigo Gun, Indigo Bomb, Indigo Pod, and Indigo Legs, as well as a pass that will allow you to access the underground. After defeating the Greybaum enemies with the boss data, you can again fight the doppelganger. This time, he will give you the Ray II Dark Robo, Ripple Laser Gun, Deva Bomb, Cerberus Pod, and Phantom Legs.

The Illegal Parts Shop
There are so-called illegal parts that can be used in the game. In order to gain access to these parts, you have to have received the Majel Set, the Dark Commander Mark, and you must have beaten your doppelganger in battle. Once that’s all done, you’ll be able to access the Underground to purchase your illegal parts. To get to the proper area of the Underground, head forward from the entrance and enter the door. Now, head to the right and go straight again. You’ll come across the illegal parts shop. Costs are as follows:

Bombs - $200
Guns - $300
Holoseums - $200
Legs - $200
Pods - $200
Robos* - $500

- Excludes the Ray 01 and Ray Sky types.

Unlock Special Robos (US)
To unlock the following robos, you must have beaten the Robo Cup.

AIRS: After beat all the characters at the grudge match, go talk to Stark then beat him.
Carat: Beat all limited robo missions, then beat Angelica.
Chick: Go to your clubhouse and talk to the left box upstair. Beat the boy hiding inside the box, but you must having a Max Combo of over 380 damage.
Hadron: Beat all the underground greybums bosses, and you will recieve Hadron data and his parts.
Illegal robos: Go to the underground the go to the middle door talk to the clerk selling parts.
Majel: After beat 12 characters in the grudge match, go in front of the clubhouse and fight your shadow.
Mistral: On the final grudge match, go to your clubhouse then beat Eddy.
Ray: After beat Eddy, Liv will came to your clubhouse, then you must beat her.
Ray 01: Go to the underground the go to the middle door talk to the clerk selling parts.
Ray II Dark: Beat your evil shadow in the underground.
Ray MK II: Go to NeoBrain ,then go to your father lab and talk to him.
Ray Sky: Go to the underground the go to the middle door talk to the clerk selling parts.
X-Ray: Go to the Police station, and talk to the person near Kris on the left sitting on the table and he will ask you to purchase it.