It is part of a larger genre of Undertale “fight simulators” that focus on specific encounters, often with added features like custom dialogue, difficulty adjustments, or performance scoring.
A Mettaton EX simulator is a standalone fan recreation of the climactic encounter in the CORE. These projects range from 1:1 mechanical recreations to "Impossible Mode" challenges that push even veteran players to their limits. Popular versions include: mettaton ex simulator
: Earns 300 points. He asks, "Toby? What the hell is that? Sounds... sexy." It is part of a larger genre of