Threetails the Fox accidentally teleports herself to Mercy Planet, while being tackled randomly by Fry the Hedgehog. Topaz teleports herself there too, to find Threetails and make sure it's safe. Topaz offers her a beef pie, but Threetails declines her offer.
Dr. EggPlankton meets Topaz the Hedgehog for the first time by setting her planet under attack! Talveda is also there, along with Tetris. Threetails takes care of Talveda and Topaz takes care of Tetris.
Mercy Planet is a purple hued planet, looking a bit like Venus sometimes. It's core inside is a big fireball, but not visible like all the other planets.