Move IDs are stored in global.active_monster_party[amp_id,amp_MOVE1] through global.active_monster_party[amp_id,amp_MOVE4] and then move data is stored in the global.move_data array. So after you get a move ID from amp_MOVE1...amp_MOVE4 you can look up global.move_data using the ID you looked up and the move data constants (they begin with the prefix "mvd_")