7.
I've never even bought Gates to Infinity. The small amount of Pokemon disappointed me so much, especially since all other PMD games had much more Pokemon. Red and Blue Rescue Team had the first 386, Explorers of Time and Darkness had 490 each (Time was missing Mewtwo, Darkness was missing Celebi), Explorers of Sky had 492, and Super Mystery Dungeon had 720. But GtI had roughly 150.