Mew

Abilities

Neutral Shield

Prevent all effects of attacks, including damage, done to Mew by Evolved Pokémon. You can't use this power if Mew is Asleep, Confused, or Paralyzed.

Psyshock

Flip a coin. If heads, the Defending Pokémon is now Confused.

So rare that it is still said to be a mirage by many experts. Only a few people have seen it worldwide.