Additionally, the user might be confused between the Mario Kart DS and Mario Kart: Double Dash!!, which is the GameCube version. They could be mixing up titles. It's worth clarifying that Mario Kart DS is for DS, not GameCube. So the "Gamecube Grand Prix" part might be a misunderstanding or a mix-up.
If they don't own the game, then advising is needed about the legal aspects. However, if they do own it, they can create a backup rom legally in some jurisdictions, but it's still complicated and region-specific. Mario Kart Ds Gamecube Grand Prix Rom Download
First, I need to confirm if there's actually a GameCube Grand Prix in Mario Kart DS. I remember that Mario Kart DS included tracks from previous games and maybe some from the GameCube version, Mario Kart: Double Dash!!. So maybe the user is referring to those tracks as the GameCube Grand Prix. Additionally, the user might be confused between the