Christ im mad now. We cant let this puny little acne covered shrub with poor stats push us around. Hehe, lets use his subs against him.
Start off by swooping down towards the ground at a rapid pace, as if youre about to use EQ, but feint at the last second and use pursuit. He should have teleported due to the descent, so pursuit will hit him hard and hell have wasted energy, plus, hell hopefully have skipped using taunt seeing as he has low speed, which is even lower now due to the scary faces and his minor confusion. Next, use Rain Dance. Seeing as its a water move, and Aerodactyl is weak to water moves, Ralts should use mimic and attack with another rain dance instead of thunderbolt. Then, finish up with a huge sky attack. Who cares about future sight, lets just get this over with.
Also, taunt doesnt lower defense.