Dragon Ball: Raging Blast 2

For this achievement you will need to unlock all the unlockable costumes. Besides all the character's defaults, there are 10 costumes to unlock and everything is found in Galaxy Mode.

Goku:
Costume 3 - vs. Yamcha and Tien
Costume 4 - vs. Turles
Costume 5 - vs. Android #19, Dr. Gero and Android #13
Costume 6 - vs. Piccolo and Teen Gohan
Costume 7 - vs. Saibamen x5

Kid Gohan:
Costume 3 - vs. Future Gohan and Ultimate Gohan
Costume 4 - vs. Meta-Cooler x5

Krillin:
Costume 3 - vs. Frieza (2nd form)

Vegeta (Scouter):
Costume 3 - vs. Dodoria and Zarbon

Android #18:
Costume 3 - vs. Goten and Kid Trunks

If your going through Galaxy mode then you'll pretty much get this along the way.
I didn't expect it but ive only done 1 battle zone apart from that its all been Galaxy so stick to it and you'll eventually unlock it