a simple bullet punch from metagross will not 1HKO my aerodactyl. if not, any aerodactyl. it only does double damage, and bullet punch has only a power of 40. try wishing for a critical. maybe it can take down a ttar though.
aerodactyl's attack is pretty high with a base of 105. falling 5 points away from snorlax's base attack. using it's versatile attacks (2 of which gain STAB) with expert belt can cover many pokemon. especially with it's unorthodox speed.
speaking of it's speed, it can easily outrace and 1HKO many OU pokemon such as alakazam, gengar, infernape, etc, as long as they do not carry choice scarf. of course like any other pokemon, aerodactyl has a weakness. maybe 2. even then, aerodactyl is truly a pokemon to behold. aerodactyl...ftw.