If two characters from each of these three games were paired into teams—but they can't be with someone from their own game—who would win in a battle of IQ?

Round 1- Each 2 character from 3 games are mixed together into 3 groups of 2 people in a battle of IQ. Who would win? Bonus Round- Not entirely based on IQ, nor actual fighting but which team would actually work together well and which won’t?