Ceruledge ex just keeps winning. How is this deck legal?

Ceruledge ex is the kind of deck that when it works nothing really stops it. Like a fat kid at a buffet. When it doesn't work everything stops it. Like a taxi on a busy day in the 90's. #pokemon #pokemonchannel #pokemoncards #pokémon #ptcg #gaming #ptcgl #ceruledge #decklist