All 30 characters.
In order to unlcok all 30 of the characters, you must first play through Story Mode with both Amp and Spica. Once that's complete, you'll have 27 of the characters available. The last 3 characters are unlocked by beating Single Flitz with each of the av
All costumes and extra song
Normally, you'd be able to purchase the last three costumes for Amp, Amp+, Spica, and Spica+ online along with the extra song. But, if you don't have your DC online you can still unlock all the costumes and the extra song (''White Cowboy -extra funky tun