Many parts in the game have tune-up slots. These slots can be used to upgrade the parts, improving their stats or adding special effects while adding to the cost of equipping the part. The items that are used in the tune up are available from The names of items are colored based on the number of slots they have.
- Items with no slots have white text
- Items with one slot have blue text
- Items with two slots have green text
- Items with three slots have red/pink text
Tune ups are performed at the Cosmos Pot in the ground area. Just to the north of the Cosmos Pot, you can also sell parts to Ouka for points and purchase a lot of the basic tune up materials.