Unlock Far East Commanders team (and Iga Base stage):
Complete the game 4 times. 

Unlock Jumbo Max team (and 79 Street stage):
Complete the game 3 times.

Unlock Discos Estrus team (and Muscle Stadium stage):
Complete the game 2 times.

Unlock Galaxy 4 team (and Disco 21 stage):
Complete the game in team mode.