Sonic Labyrinth (ソニックラビリンス) - Cheats

Stage select

During the title screen, press [Up] x2, [Right] x3, [Down] x6, [Left] x9. The world Select will appear. In the Config menu, the Stage option will replace the Sound option.

Bonus stage

At zone 2-3, find the cannon and hold [Right] + [1] + [2] . Turn on the button to open the door to the bonus stage.

Action Replay codes

00C50109: Infinite Time
00C50609: Infinite Lives

See the main page for Sonic Labyrinth (ソニックラビリンス)