Sega Smash Pack [GBA]

Turn Ecco to the left or right. Pause game play when Ecco is facing the screen. Press Right, B, R, B, R, Down, R, Up. A cheat menu with stage selection, sound select, and unlimited life will appear.

Golden Axe: Level select:
Select arcade mode. Hold Down/Left + B and press Start at the character selection screen. A number that corresponds to the starting level will appear in the upper left corner of the screen. Use the D-pad to change this value.

Golden Axe: Nine continues:
Select arcade mode. Hold Down/Left + A + R. Release the buttons and press Start.

Sonic Spinball: Level select:
Press A, Down, B, Down, R, Down, A, B, Up, A, R, Up, B, R, Up at the options screen. Enter one of the following controller actions to start at the corresponding level.

Level 2 (Lava Powerhouse)
Hold A and press Start.
Level 3 (The Machine)
Hold B and press Start.
Level 4 (Showdown)
Hold R and press Start.

Sonic Spinball: Multi-ball stage:
Collect all the rings on a level and use the gate that appears to be a large shining ring.