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.