Pacquiao-Valero Pacquiao-Guzman Pacquiao-Malignaggi Pacquiao-Soto Pacquiao-Berto These are fighters that I have heard people say he ducked...
Stops Valero, Malignaggi and Berto. UDs Soto. SD's Guzman - or loses a SD or draws but ultimately wins a trilogy with Roach finding a way to adapt to Guzman. (if we are talking back at super feather around 2006-08 when it was a hot topic)
Valero would probably be Hatton'ed Malignaggi would be pummelled and stop mid rounds. The other two would probably be UD'ed or stopped late rounds. Guzman is interesting, I think Pac beats him in a close but competitive UD. 4 rounds at most gap. Even SD
He beats all those guys easy. The only matchup of the set that is remotely interesting is Valero due to the power, but the gap is skill is so wide that even there just not much to work with.