Mysterion saves Karen?

I've played both SouthPark games and watched most of the episodes on Netflix, at least there are.
But there are scenes where Kenny saves his sister from bad children as a mystery. Who can tell me what the consequences are?

Season 15 episode 14 Always trouble with Proll Trash.
You can watch all at southpark.de for free, there's also an app

Thank you! I'll do it in a minute!