In order to obtain Gyaradosite, you must first upgrade your Mega Ring and look for it in Couriway Town. It can only be found between 8pm and 9pm and it's hidden at the middle waterfall.
If you want to know how to upgrade your Mega Ring, simply check the related questions below.
*Mew is not catchable in Pokemon x and y, but you can get him online from wondertrades and such. Mewtwo however, is catchable and you can find him in the cave in pokemon village.
Parfum Palace. Find the owner's Furfrou and he will give you it.
Dive is no longer a TM or a HM in Pokemon X/Y. You'll have to have a Pokemon learn it naturally.
Yes You Can Get A Pikachu In Pokemon X and Y.
The Legendary Pokemon available in Pokemon X/Y are:Xerneas (X only)Yveltal (Y only)ArticunoZapdosMoltresMewtwoZygarde
You may be able to find someone to trade a Special Torch for Pokemon C or Y in a Pokemon Facebook group.
Pokemon X and Y are sold at MSRP of $39.99 (CAD)
The list attached gives an overview of where they are
You cannot find the Mega Stone for Latios in Pokémon X or Pokémon Y.
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Prof. Sycamore will give you the oval charm in Pokemon X and Y.
Pokemon capable of learning Psywave as an Egg Move in Pokemon X and Y are Latios (Pokemon) and Gastly (Pokemon).