Ill name a few.
In Z battle gate, you will face many opponents. Depending on how much health you have left, and how quickly you beat your oponernt, you will get z items. They will sometimes be charcters, or they will be attachments. Or they could also have an f next to them. If they do, You can fuse them with other Capsules(the f stands for fusion) For example, Android 17 f + Android 17 f =Super 17.
Good bye everyone, it's been fun!
Special thanks to ED_, superman4u, and Cross Stinger
Credit for the Siggy goes to shadow slayer