Catch An Exclusive Anniversary Azelf! This November 2018 only - catch our exclusive 6th Anniversary Azelf! That's right, this is by far the most exclusive Pokémon EVER - it will only appear this November, it is never coming back. If you're a collector, be sure to catch it before it leaves on December 1st! Remember, if you catch a few, you'll be able to trade these later on. They'll be by far the rarest Pokémon on Lake Valor!