Sonic Heroes Cheats

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2P Mode Higher Up Sky Jump:
First pick any charcter in 2P mode. (This is only in battle mode.) Now go to any stage in Battle Mode. Now jump in speed formation and use homing attack and do it again until it goes all the way up. Its higher jump but only in 2P mode.
User Cheat by Embraun

Two player Team Battle mode:
By collecting 20 emblems in single player story or challenge mode.

Two player Special Stage mode:
By collecting 40 emblems in single player story or challenge mode.

Metallic Team Sonic Characters in two player modes:
In the 2 player select screen, hold A+Y on your team and continue to do so until game begins
User Cheat by gimp

Metal Sonic Story mode:
To get metal sonic story mode collect all 7 chaos emeralds and beat story mode with every team.
User Cheat by www.t.team.4

Final battle:
Finish the game with everyone to face Dr. Robotnik in one final battle where everyone is combined to defeat him once and for all.
User Cheat by JonB

Homing Comet:
When on a three star spring, jump on the springs with the homing attack. Now push Y another time to form a comet. When it is level 3, the comet will be larger.
User Cheat by JonB

Every mission for Team Chaotix:

SeaSide Hill: Find all ten Hermit Crabs.
Ocean Palace: Rescue the Chao in the palace.
Grand Metropolis: Clear out the enemies in the city (85).
Power Plant: Defeat the three Gold Camerons.
Casino Park: Win 200 rings.
Bingo Highway: Collect ten casino chips.
Rail Canyon: Infiltrate the terminal station.
Bullet Station: Destroy thirty capsules.
Frog Forest: Avoid detection by the Frogs.
Lost Jungle: Rescue ten Chao.
Hang Castle: Get the keys in the castle.
Mystic Mansion: Blow out all sixty red torches.
Egg Fleet: Avoid enemy detection.
Final Fortress: Find the keys to the client's cell.

Two player Ring Race mode:
By collecting 60 emblems in single player story or challenge mode.

Two player Bobsled Race mode:
By collecting 80 emblems in single player story or challenge mode.

Two player Quick Race mode:
By collecting 100 emblems in single player story or challenge mode.

Two player Expert Race mode:
By collecting 120 emblems in single player story or challenge mode.

Metallic characters in single player mode:
By collecting 141 emblems in single player story or challenge mode.
User Cheat by Alfonso The Great

Follow Me song:
Finish story mode as Team Rose.

Team Chaotix song:
Finish story mode as Team Chaotix.

This Machine song:
Finish story mode as Team Dark.

We Can song:
Finish story mode as Team Sonic.

Team Chaotix FMV sequence:
Finish story mode as Team Chaotix to unlock their FMV sequence in the CG Theater.

Team Dark FMV sequence:
Finish story mode as Team Dark to unlock their FMV sequence in the CG Theater.

Team Rose FMV sequence:
Finish story mode as Team Rose to unlock their FMV sequence in the CG Theater.

Team Sonic FMV sequence:
Finish story mode as Team Sonic to unlock their FMV sequence in the CG Theater.

Super Hard difficulty setting:
Finish the game with all "A" ranks and 141 emblems.

sonic light dash attack:
You can do a sonic light speed attack  after the team blast attack, you have to use tails, get in the air and press B and sonic will do a light dash attack.
User Cheat by blackblazerk