Play as Amy:  In a new game, complete all three Acts of Toy Kingdom Zone with Sonic as the leader.

Sound test:-  Successfully complete the game. You do not need all the Chaos Emeralds. The "Sound Test" option will appear just above "Delete Game Data" in the options menu.

Change color settings:-  Press R at the "Press Start" screen. In the upper right corner, the game will display the color setting that you are currently on. Press R again to change the color settings. There are three color setting: "Game Boy Advance Cheats, Codes and Walkthroughs for ", "Game Boy Advance Cheats, Codes and Walkthroughs for SP", and "Game Boy Player". The color settings optimize the color for the system that you are using.

Use the following trick to defeat Eggman at the Alter Emerald easily. Select the Sonic/Tails combo. After you defeat the sub-Boss robot, you will face a giant robot Boss. An easy way to defeat him is to use Tails' Tag Action in the air. You will start flying. Use Tails' spinning tails as a weapon against Eggman. You will hit him a maximum of three times. Beware of his hands, though. The more you hit him, the more attacks he will use on you. The two you should really watch out for are his hands trying to remove two of the ground tiles; and when he uses the red metal balls as ping-pong balls. This can help you get a gold medal in the Alter Emerald level and get to the Nonaggression level easier (if you have all the Emeralds).

Use a team consisting of Cream and Tails/Cream and Knuckles in story mode. Continually fire Cheese the Chao at him to blow him up quickly.

Eggman as partner:  After collecting all the Emeralds, play the "Final Boss level" with Sonic as the leader and anyone else as your partner. Once you change to Super Sonic, Dr. Eggman will become your partner in order to help you defeat the final Boss.

Easy height:  Have Tails as your partner. If you missed an elevated platform or area during a level, use Tails' Tag action on the ground. About 95% of the time you will be able to reach what you fell off from. Note: This can also be done to access certain areas of the Act faster.

Moonwalk:  Your character can run backwards by holding R and preparing the Tag Action (do not use it). Run and jump in the air. When in the air, press the D-pad in the opposite direction you are running and do not touch it afterwards. Your character will run in a direction and he or she will be facing the other way. This is best done as Sonic, as he is the fastest character.

Finding Chao:  Two of the best character combinations for finding Chao are Knuckles and Tails (Knuckles can glide and climb walls, and with Tails as his partner he can go just about anywhere); or Tails and Amy (this allows Tails to fly much higher for those hard-to-reach spots.). Sometimes a Chao can be underwater. Sometimes you can find a Chao in the Zone Map (where you go into the Act Rings.). If you go to the Chao Garden in the Sonic Factory, and press Select, you can see what Chao you have and do not have. If the missing spot where a Chao should be is marked with a "1", you will find it in Act 1. A "2" means that you will find it in Act 2. If it is in Act 3, it will read "3", and the "M" indicates that you will find it on the Zone Map.

Gameshark codes

Enable Code (Must Be On)
0000E830 000A
100B9B14 0007

Invincible (While moving)
A30015DC 0000
8300160C 000F

Always Have Speed Shoes
A30015DC 0000
8300161C 000F

Infinite Rings
8300094C 03E7

Infinite Lives
33000954 0009

Infinite/Low Time
8300094E 0200

Hold Select To Pass Through Certain Objects
D0000020 0004
330015C7 0003

Press L For Reverse Gravity/Press R For Normal Gravity
730015DE 0200
830015C6 0001
730015DE 0100
830015C6 0000

Tails Never Gets Tired When Flying
33001708 00D5
730018D4 000A
830018D4 00D5

Cream Never Gets Tired When Flying
33001704 00D5

Enable All Characters
33000540 001F

All Levels Open
83000558 7F09

Have All Chaos Emeralds
83000562 FFFF

Have All 9 Keys
43000552 0909
00000004 0002

Unlock Special Stage Mode [Note 1]
83004120 000B

Always Get A Chaos Emerald
43004866 0000
00000007 08EC

Have All Choas Found
43000544 03FF
00000007 0002

Have All Chaos Emeralds
83000562 047F

Mega Jump
D0000020 0001
830015DA FB00