Pokemon Puzzle League (N64)

Unlock all selections in the Puzzle University:
At the title screen, hold Z and press A, B, R, A, A, B, R, A.


Unlock High speed marathon mode:
At the title screen, hold Z and press B, A, L, L,
or, get at least 10.000 points in the time zone.


Unlock V-Hard difficulty:
At the difficulty selection, hold Z and press L, L, A, B,
or, beat the game on Hard mode.


Unlock S-Hard difficulty:
At the difficulty selection, hold Z and press R, L, A, B,
or, beat the game on V-Hard mode.


Start in Mewtwo's stage:
At the trainer selection screen, hold Z and press B, Up, L, B, A, Start, A, Up, R,
or, beat the game on S-Hard mode.


Unlock all trainers:
At the trainer selection screen, hold L + R + Z on controller 1 and 2,
or, beat the Spa Service game.


Badges:
To earn the different badges you have to beat the following characters: