SPEEPSHighway | Sonic Adventure DX JP Pre-Release Demo - Nintendo GameCube Software e-Catalog @SPEEPSHighway | Uploaded 8 years ago | Updated 2 hours ago
This is a demo of SADX on a Japanese software catalog disk from Spring 2003.

Each character has 2 minutes to clear one of their stages:
Sonic - Speed Highway
Tails - Icecap
Knuckles - Red Mountain
Amy - Final Egg
Big - Emerald Coast
Gamma - Windy Valley

The disk also includes the Tails, Knuckles and Amy Chao.