I want to peg N from pokemon until his lega can't move.

Use a lot of “if you”

"You do/did"

"You're lying"

Or even "are" in the right circumstances

Can I use "do you even feel bad for what you did?"

Absolutely.

And when they start to apologize, what is the next thing to do?

"You don't really mean that. You're just faking to try to make me feel better." or something along those lines

Alright, thank you.