Complex sentence: She is also a mini-boss twice in New York when the player chooses to be on the Anti-Registration side: the first is when she is knocked out by Thing, the second is when the heroes on the Anti-Registration side defeat her.
Split into simpler sentences: She is also a mini-boss twice in New York when you are on the Anti-Registration side. The first is when she is knocked out by Thing and the second is when the heroes on the Anti-Registration side defeat her.