Pedro was the captain of Nox Pirates and he was first introduced at Zou arc. He and his crew were searching for Poneglyphs. Then, he entered Totto land and also fought against Big Mom Pirates.
But, they were utterly defeated by Big Mom Pirates, and there crew got annihilated except for Pedro. After that he left his pirate life, but he still has an active bounty of 382,000,000 berries.