Mangy as Core!Frisk.

Mangy is from the another episode, where he falls to the dark pit of the abyss that saved Nappy's life in the most way, he woke up, the father turns into a informative among those AU's against the episodes of the multiverses, he can also create a metal door to open the multiverse episodes, he was only un-killable, before Rinny was angered till she tried to kill him, he will mock, hate and taunting her as their loyal informative.

He was lawful good, still chill and strict.