For a limited time, a bonus disc was available with the release of Mario Kart: Double Dash!!. On it contained various demos for upcoming releases. Also on this disc was an option to link up to Fire Emblem: Rekka no Ken, by doing so you will unlock some items only available from the bonus disc. During link-up you will also unlock the secret soundtracks 99 and 100. This bonus disc was only available in North America.