In exhibition mode, beat the CPU at hard difficulty level a few times (the number is randomly set between 1 and 10). God Difficulty Level must be unlocked one by one for each character, in singles and doubles.
Unlock the following characters by performing the corresponding tasks:
CHARACTER - HOW TO UNLOCK Unlock Gloria - In story mode, after the second ending, go back to the volcano site and select to play as Suzuki before you enter the last room. Gloria will be inside. Unlock Norma - In story mode, after the first ending, go to the volcano site and beat every player until the final door. Play as Emi to enter, then beat Norma. Unlock Suzuki - In story mode, once Schneider joined the party, come back to his stage then talk to Suzuki. He will challenge you, so beat him to unlock him. Unlock Yakkun - In story mode, once Brad joined the party, come back to his stage and talk to Yakkun. He will challenge you, so beat him to unlock him. Unlock Helghast - After Colin joins in Story mode, go back to the stage room and defeat him. He can also be used as an Umpire.
Unlock the following courts by performing the corresponding tasks:
COURT - HOW TO UNLOCK Backstreet - After Wendy joins the party in Story mode, return to her stage. Talk to the enemies near the athletic field, then defeat them. Lake Garden - After Rosetta joins the party in Story mode, return to her stage. Talk to the driver of the limousine, then defeat him. Theme Park - After Tiger joins the party in Story mode, return to his stage. Talk to the little girl near the entrance, then defeat her.
After defeating Colin at World Television Studio, instead of going to the Victor Mansion, instead return to the World Television Studio. The producer, Bando, will ask you to match the Helghast Troop's Boss. The Helghast tends to play close to the net and has powerful skills. After defeating him you will unlock the Helghast Character and you can even use him as Umpire. You also get a Loyalty Bonus (Boss Defeated).
After defeating Colin at World Television Studio, return there and speak with Producer Bando. Play a match against him and, after winning this match, the Fans will give you the Panda Costume as a gift.