Intentionally run out of lives while playing a game. Then at the high score screen, press A, B, A, B, Select, Start. A cheat option will now appear on the main menu.
|Stop Traffic And Turtles|
While playing a game, press A, B(2), Left, Right, Up, B, A to stop traffic and keep the turtles from sinking. If you entered the code correctly, a traffic light will appear.
|Gameshark Frogger Hacks|