Free disk, requirements:
my nintendo membership
register GameCube and five games
http://www.nintendo.com/metroidprime2.jspThe Metroid Prime 2 Echoes Bonus Disc includes:
Metroid Prime 2 Echoes playable demo - Shows areas in the Dark and Light World. It also features new weapons exclusive to Metroid Prime 2 Echoes.
Metroid Prime 2 Echoes Trailer - Sneak peek of the story behind Metroid Prime 2 Echoes.
Metroid Prime 2 Echoes Preview - Brand new in-depth look at Metroid Prime 2 Echoes showing many exciting aspects of the game.
Metroid Prime Art Gallery - Artwork from Metroid Prime and never-before-seen artwork from Metroid Prime 2 Echoes. Presentation is set to music from Metroid Prime and features cool transition effects.
The Metroid Chronicle - Historical look at the Metroid franchise. Presentation features footage and music as well as a brief synopsis of the storyline of each game.