Konjiki no Gashbell! Yuujou no Tag Battle

Akatsuki:
Beat Zeon level 2, then defeat Akatsuki.

Zeon:
Beat level 1 in mission mode with all characters

Bonus characters
Finish the single player mode and reach 50,000 points on all 6 levels
with the following characters:
Unlock Zofis: Finish Single Player mode with Brago.
Unlock Zeon: Finish Single Player mode with Tio.
Unlock Victorim: Finish Single Player mode with Reira.
Unlock Ted: Finish Single Player mode with Umagon.
Unlock Rein: Finish Single Player mode with Gash.
Unlock Keith: Finish Single Player mode with Bari.
Unlock Earth: Finish Single Player mode with Ted.
Unlock Bari: Finish Single Player mode with Kanchome.