Faceball 2000
Level 1 to 10 Warp

When you get to the flashing section of the wall at the end of the First Level, turn 180 degrees and fire at the wall. The wall will dissapear, revealing a clue item that will warn you that you are nearing a warp. Walk foward and fire at the next wall, which will reveal a flashing wall. Walk through the wall to warp to level 10.

Final Fantasy Legend
Sound Test

To access the hidden Sound Test, go to the title Screen and Simutaneously press and hold DOWN+SELECT+A for around five seconds or more.

Final Fantasy Legend II
Sound Test

On the Title Screen, simultaneously press SELECT, B, and START. Change the number by pressing RIGHT/LEFT, and listen by pressing the A button. To hear more sound effects, go to the Title Screen and select "continue." Move the cursor to a save file with a party over level 57, then press B to go tback to the Title Screen. Hold SELECT, B and START to access the Sound Test and press A to listen to the sounds. the number of sounds you can listen to is the amount of Levels in your Party.

Frogger
Cheat Menu

On the high score screen after you run out of lives type in A, B, A, B, SELECT, START. Return to the main menu to access the new CHEAT menu.