Beat the national championship once and talk to DJ in the lobby, and he'll give you the Dual Dragoon bit chip.
Unlock Daichi
In order to unlock the little guy Daichi, you have to defeat him in Tournament Mode. When you defeat Daichi and win the tournament (he'll randomly appear), he will join your roster.
Use the DJ
In order to use the DJ (that's right, the announcer!) you have to defeat DJ in the tournament. I believe you cannot have any "Try agains" in order to get this character. If you're using DJ, Kenny or Tyson will be the announcer.
Play as King
Defeat King in tournament mode. Win the tournament to unlock him as a playable character.
Stronger hit
Immediately press A when you hit your opponent to do slightly more damage.
Dragoon V2 Booster Pack
Win the Tournament once, then talk to DJ in the lobby. Win the Tournament again and go back to DJ to get the Dragoon V2 Booster Pack.
