Play as Miss Bianca:
Go to the title screen and press Up, Left, X, Z, and Right. You will then be able to play as Miss Bianca from the Rescuers Down Under.

Sonic Crying Cheat:
Beat Tails's story once. Then, go to the station square where Sonic will get tripped by a rock 33 times and sonic will appear sobbing. BR> Submitted by mikeandbuck9.

Big and Sonic cheat:
During game play press start, up, left, y, x, and z. Big will appear next to sonic.

Submitted by mikeandbuck9. big and sonic cheat: during game play press start and press up left y x and z.and big will appear next to sonic.

Play as Joanna:
Go to the title screen and quickly press up, down, left, and right. You can now play as Joanna.

Submitted by mikeandbuck9.

Tails and Marahute cheat:
You must go to windy valley level and press start, up, up, left, left, left, left, right, right, and then right. Tails will get a visit from marahute in the rescuers down under.

Submitted by mikeandbuck9.

Cry as Sonic cheat:
You must get on the spikes on any level. Quit 2 times and Sonic will cry.

Submitted by mikeandbuck9.

Kiss as Amy:
To kiss any sonic characters, beat Amy's story once and go to station square with her and Sonic will appear next to her. Press the Z button to kiss romantically.

Sonic Chaos: Level select:
Press Up(2), Down(2), Right, Left, Right, Left when "Press Start" appears at the Sonic Chaos title screen.

Sonic Chaos: Instant Chaos Emeralds:
Press Up, Down, Up, Down, B, A, B, A, B, A at the Sonic Chaos character selection screen.

Sonic Chaos: Sound Test:
Press Down(2), Up(2), Left, Right, Left, Right, B, A at the Sonic Chaos title screen.

Sonic Chaos: Extra continues:
In the first Turquoise Hill Zone mission, press Up + A to make Tails fly to the top of the screen. Stay there until the CPU makes you get down. When your points are getting added up, you should get three to four continues.

Sonic Labyrinth: Level select:
Press Up(2), Right(3), Down(6), Left(9) when "Press Start Button" appears at the Sonic Labyrinth title screen.

Sonic Spinball: Level select:
Enter the "Sound Test" option for Sonic Spinball. Then, play the following songs in order: 0, 2, 1, 5, 6, 6.

Sonic Spinball: Faster background music:
Enter the "Sound Test" option for Sonic Spinball. Then, play the following songs in order: 0, 4, 2, 5, 5, 7.

Sonic Spinball: Disable gravity:
Enter the "Sound Test" option for Sonic Spinball. Then, play the following songs in order: 0, 9, 0, 1, 6, 8.

Sonic Spinball: Zoomed in view:
Enter the "Sound Test" option for Sonic Spinball. Then, play the following songs in order: 0, 2, 1, 1, 6, 6.

Sonic The Hedgehog 2: Level select:
At the Sonic The Hedgehog 2 title screen, Tails will blink his eyes (first once, then two times quickly). While holding Down/Left + A + B, tap Start just when his eye shuts on the second blink of the double-blink.

Sonic Triple Trouble: Level select:
Hold Up when the Sega logo appears. Wait until Knuckles touches the red emerald then quickly press Start.

Two player Game Gear mode:
Press Start on controller two to display a second Game Gear screen for that player. If the original Game Gear game supported the multi-player link, the current game will switch to multi-player not. If the game did not support the multi-player link, game play on each screen will be unrelated.

Toggle Game Gear game screen:
To view the Game Gear games in a smaller, not pixelated view, press L + R. Pressing L + R again will return the view back to normal.

In-game reset:
Hold Start + A + B + X for a few seconds during game play.

Zoom in and out of Chao Gardens:
Go to mission mode and select Big. Go to the Chao Garden. Cast your fishing pole into the water and reel in your line. Press Y + L to zoom out, and Y + R to zoom in. If this does not work, pet a Chao then do it. This can be done in all three Chao Gardens. Note: This does not work in adventure mode.

Game Gear games:
Each time you complete ten missions or collect Sonic Emblems, you will unlock a new Sonic mini-game. After unlocking the first mini-game, Sonic The Hedgehog, the "Mini Game Collection" option will appear as a play mode at the main menu.

There are a total twelve Game Gear games. They are unlocked as follows:

0 to 100 Emblems: One Game Gear game for every 20 Emblems.
100 to 130 Emblems: One Game Gear game for every 10 Emblems.
0 to 60 missions: One Game Gear game for every 20 missions.
Tails Adventure is unlocked for getting the other 11 missions.

The games are unlocked in the following order:
Sonic 1
Sonic Drift 1
Sonic Chaos
Sonic Spinball
The order then varies from here onward for: Sonic Labyrinth, Sonic 2, Dr. Robotnik's Mean Bean Machine, Sonic Triple Trouble, Sonic Drift 2, Tails Skypatrol, Sonic Blast, and Tails Adventure.

Play as Super Sonic:
Complete the game using all six starting characters to unlock Super Sonic. Sonic will transform into Super Sonic after some time into the next game.

Play As Metal Sonic:
Collect all 130 Emblems to unlock Metal Sonic in trail mode.

Play as Tails:
Controller two may be used for Tails after he is obtained during game play in story mode. Note: Shields, invincibility and extra life boxes have no effect on Tails if collected. Note: If Tails goes too far away from Sonic, he will appear next to Sonic.

Mission mode:
Successfully complete the game in adventure mode with all characters to unlock the "Mission Mode" option at the main menu. Glitch: Man falls through floor: