Have 99 Fly Coins:
800AB0B4 0063

Have 24 Paw Coins:
800AB0B8 0018

Have 99 Bonus Coins:
800AB0BC 0063

Have 99 TV Remotes:
800AB0C0 0063

Infinite Lives:
800A2ACE 0005

Infinite Health:
800AB0B0 0005

Press Select To Make Gex Speak:
800AB194 2000