http://cheatsforgamecube.info Cheat for GameCube game Sonic Adventure Dx: Sonic Super Jump In Emerald Co... Feed 2012-05-23 en http://cheatsforgamecube.info/sonic-adventure-dx/cheat/42192.html the Emerald Coast level.

Go to where you find the second exrta life capsule.
Do a lgiht speed dash into the slope from behind. Sonic will jump really high and then fall to the ground.]]>