See Playstation All Star Professional Wrestling 2 cheats here!

Kazuo Yamazaki:
Select Yuji Nagata and win the IWGP belt.

Kotetsu Yamamoto:
Select Tiger Hattori as a referee, then KO him.

Shinjiro Ohtani (junior version):
Defeat the heavyweight class Shinjiro Ohtani with a junior wrestler.

White Mask:
Choose Inoki as your partner in a singles mode match.

Yuusaku Yuri and Kenichiro Jinnai:
Win the game in rising mode.