Serious Mode

Serious Mode (for lack of a known official name) occurs under certain conditions and removes minor jokes while it is in effect.

Known Serious Mode occurrences

 * While fighting Asgore on the Neutral Route. This flag is not always cleared properly and may persist if you die or quit.
 * During a Genocide Route playthrough.

Known effects of Serious Mode

 * Butterscotch Pie is abbreviated as "Pie" rather than "ButtsPie".
 * Instant Noodles are eaten dry, skipping the excessively long preparation time and recovering 90 HP instead of 4.