The Pacifist one irked me a little, and that's because there's no cutscene or interaction with Squid Dog.
Maybe have him give the player a thumbs up? Or show him the way out? Or stop the monsters attacking? Make a hand heart gesture? Just to let the player know the giant approves of their no-violence run, rather than it briefly "glitching out" to the next area.
When it first happened, I thought the game was bugged and accidentally skipped a boss fight.