Here are some codes for Cricket 97 ATE:
132 - Ultamite Austrailia team, all player ratings at 10! Type at team selection screen and select Austrailia.
223 - Play a night match. (patch required, click on download, then patch v3.0)
For the following codes to work, start a game, then press pause ant type in code
111 - Exploding stumps
321 - Limated gravity
131 - Hit ball harder
323 - run faster