"Mew is said to possess the genetic composition of all Pokémon. It is capable of making itself invisible at will, so it entirely avoids notice even if it approaches people."
It's funny that the original is placed after the clone in the Pokedex, but who are we to judge? Mew is a very curious Pokemon in many aspects, not the least of which is that it can learn ANY Pokemon move. Or specifically, any move that you have a TM for. This is because of its genetic makeup in that it has the DNA of every Pokemon inside of it. Unlike its clone Mewtwo, Mew is shown to be very lighthearted and free-spirited.
Mew's Basic Attack is Pound, while its Special Attacks are Blizzard, Earthquake, Psychic, Focus Blast, Thunder, Fire Blast, Hyper Beam, Solar Beam, Hurricane, Dragon Pulse.