Sonic Adventure DX: Director's Cut

Sonic's Boss Batle

 * Chaos 0
 * Egg Hornet
 * Chaos 4
 * Chaos 6
 * Egg Viper
 * Perfect Chaos

Tails' Boss Battles

 * Egg Hornet
 * Chaos 4
 * Egg Walker

Knuckles' Boss Battles

 * Chaos 2
 * Chaos 4
 * Chaos 6

Amy's Boss Battles

 * Zero

Gamma's Boss Battles

 * E-101 Beta
 * E-103 Delta
 * E-104 Epsilon
 * E-105 Zeta
 * E-101 Mark 2

Big's Boss Battles

 * Chaos 6

Sonic's Upgrades

 * Speed Shoes