I like how the description and rules contradicts themselves with " Each team will be able to have up to two special Pokémon, such as Legendary or Mythical Pokémon." followed by "Players may use Pokémon with National Pokédex number 1 through 719, with the exception of the following: Mew, Celebi, Jirachi, Deoxys, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Keldeo, Meloetta, Genesect, and Diancie." Not even Deoxys is spared (now that it is obtainable in-game I'd have hoped) so which Mythical Pokemon is missing from the banlist? I mean why else would you say you can use Mythical Pokemon in the opening statement if you're going to ban all of them.
Or has the person writing that not understood the difference between legendary and mythical (that is mythical can't be obtained through in-game alone).