Error!Undyne is stronger than Undyne the undying.
The information that can be gathered in this location. Upon entering the True Lab, the True Pacifist Route can no longer be aborted, and most of the Underground becomes inaccessible until the epilogue. This area is the point of no return for the True Pacifist Route. Error!Undyne takes refuge in the void and is very aware of Error!Papyrus's existence. Alphys is the Admiral of the Royal Navy, and a major character encountered in TSUnderswap. The True Laboratory is a private section of Alphyss Lab that can only be found and entered during the True Pacifist Route. There is no explanation yet that We could find on how Undyne became Error!Undyne.