I was wondering if R. magikarp's Waterfall Evolution can be used with
Aerodactyl.  I'm guessing it can't be, since the attack counts as evolving
magikarp, but I'm not sure.
                                        -FossilMagikarp

You are incorrect.  Aerodactyl's Power States that Evolution cards can not be played.  Rapid Evolution does not play the card, it puts it ON Magikarp.  A subtle difference.

I would also like to state something right now.  Clefairy/Clefable can NOT evolve into Gyarados, no matter what you may hear.  This subject came up on the Wizard's Chat a while back, where the MTs stated that they thought you could.

I hope the MTs please look closely at Magikarp.  They will see that using Waterfall Evolution DOES count as evolving the Pokemon.  This means that the Evolution must be a LEGAL evolution.  A Gyarados can not be evolved from a Clefairy or a Clefable.  The game rules of Evolution still do apply here.  You can not evolve something through special means unless you could legally evolve it anyway. 

My point to back this up is Pokemon Breeder.  You can't put a Blastoise on a Charmander - that is not within the rules of the game, and not a legal evolution.

Well, rant mode off.

Scott