To reset your Dreamcast's internal RAM, insert the Web Browser GD into your Dreamcast. Now plug a single controller into slot B amd hold buttons B and X while turning on the system. Continue to hold them until the Web Browser's login screen appears.

Note: This is very useful if you were disconnected while registering with Worldnet. It's the only way to restart the process.

Pres all four pad buttons and then hit start to reset your game.