Unlock the Underground
Once you've beaten roughly a dozen different grudge matches (the exact number varies), go to the front of the clubhouse and fight your shadow self. Defeat him and you'll some illegal parts and the dark commander mark. Talk to the suspicious man in the bottom left house in the Bayside area to open the secret passage to the underground.
Unlockable Dioramas
| Unlockable | How to Unlock |
|---|---|
| King's Throne Diorama | Get to King Rank, then talk to Lambda Halburn at Neobrain. |
| Victory Diorama | Get to King Rank, then talk to Lambda Halburn at Neobrain. |
Unlock Sudden Death Stage
After you beat the Robo Cup, talk to the scientist facing the glass in the laboratories on the upper floor of NeoBrain. If you can beat him, you'll be able to purchase the stageUnlock Special Robos
You must have beaten the Robo Cup to unlock the following
| Unlockable | How to Unlock |
|---|---|
| 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. |
