The developer of Rune also has a Pokemon-like adventure game coming to GameCube in 2002.
GameSpot has acquired From Software's 2002 lineup, which includes Gold Star Mountain for GameCube. Here's the description:
This is a 3D action-RPG where players train and raise animals that have a mind of their own. The main character is a young boy who uses a gun as his weapon. The game is divided into two parts: training animals and battles. Items acquired during battle can be used to raise the animals.
Raising animals with a gun-toting shepherd/warrior has never been so enticing. We should soon have some further details and media from Space World, but there's no word on whether Gold Star Mountain will be shown on video or in playable form.