Replaying Undertale has consequences. To fight Mettaton EX legitimately, you must either complete a Neutral route (sparing or killing specific monsters) or a Genocide route (which permanently stains your save file). A simulator offers three distinct advantages:
For the technically inclined, Unitale (a Undertale battle engine) and its successor UTMT allow you to download custom scripts. You can find "Mettaton EX.lua" scripts on GitHub. 100% customizable. You can change Mettaton’s dialogue or add new attacks. Cons: Requires setup and knowledge of Lua scripting. mettaton ex battle simulator
Ratings rise during Mettaton's turn, but taking damage loses 100 points and stops the bonus. Violence Bonus Replaying Undertale has consequences
The player's SOUL turns yellow, allowing it to fire projectiles upwards to destroy or manipulate hazards. Mettaton/In Battle - Undertale Wiki You can find "Mettaton EX
A true simulator focuses on the "Yellow Heart" mechanic. Your soul turns yellow and upside down, allowing you to at Mettaton’s various obstacles. Obstacle Mini-Mettatons
Mettaton doesn’t want to kill you—he wants to entertain you. In a proper simulator, your "health" is secondary to your . Each attack you dodge, each pose you strike (via the ACT menu), and each bomb you defuse raises or lowers your rating from "OK" to "STAR" to the coveted "LEGENDARY." Let your rating hit zero, and Mettaton cancels the show—game over. This shifts the player’s focus from survival to performance.