I believe someone else has also mentioned this, but I'll expand on it. 
Aerodactyl is a good card to add to a Haymaker Deck.  The point of Haymakers
is to attack quickly before your opponent can build up and evolve his or her
Pokemon.  Using Aerodactyl takes this one step further by keeping your
opponents Pokemon from evolving.  Aerodactyl's Pokemon Power won't affect
your Haymaker becuase they use only Basic Pokemon.  Meanwhile, your opponent
is left with Abras or Squirtles that can easily be KO'd.  Aerodactyl won't
last forever (he does only have 60 HP) but can provide you with enough time
to wipe out your opponent.  Aerodactyl does have some drawbacks.  He's not a
super fighter and he evolves from Mysterious Fossil.  Probably the biggest
drawback is that you can only have one Aerodactyl in play at a time. 
However, in conclusion, I think Aerodactyl could be a very useful card in a
Haymaker deck.  My e-mail address is Woof246@aol.com if anyone wants to write
to me.