Complete specified challenges in challenge mode to unlock following riders.

Rider	How to unlock
Akira Yanagawa	Complete Challenge 99
Alex Barros	Complete Challenge 09
Alex Barros (Alternate Version)	Complete Challenge 88
Carlos Checa	Complete Challenge 07
Daijiro Kato	Complete Challenge 06
Daijiro Kato (Alternate Version)	Complete Challenge 89
Garry McCoy	Complete Challenge 13
Hitomi Yoshino	Complete Challenge 85
Jack Slate	Complete Challenge 01
Jeremy McWilliams	Complete Challenge 20
John Hopkins	Complete Challenge 18
Jurgen VD Goorbergh	Complete Challenge 21
Kenny Roberts	Complete Challenge 05
Kevin Schwantz	Complete Challenge 08
Loris Capirossi	Complete Challenge 16
Max Biaggi	Complete Challenge 10
Mick Doohan	Complete Challenge 15
Nobuatsu Aoki	Complete Challenge 91
Norick Abe	Complete Challenge 04
Oilvier Jacque	Complete Challenge 90
Pere Riba	Complete Challenge 17
Regis Laconi	Complete Challenge 19
Sete Gibernau	Complete Challenge 14
Shinya Nakano	Complete Challenge 11
Tetsuya Harada	Complete Challenge 03
Tohru Ukawa	Complete Challenge 86
Valentino Rossi	Complete Challenge 12
Wayne Gardner	Complete Challenge 87
Wayne Rainey	Complete Challenge 02