Everyone is saying that Bulu is better than Rayquaza because it needs 6 energy to hit 180 however nobody is acknowledging the fact that it’s 6 grass and electric energy attached to all your Pokémon in play you don’t have to get 6 energy on every single Rayquaza.
Of course we acknowledge this, it still means that you need more energy on the field to hit the same damage numbers, and you have to keep that energy on the field. It doesn't matter what it's attached to, you will take more turns to get the same damage out of Rayquaza that you do out of Bulu, and it will be harder to reset your board from lost energy, since if you don't have 3 on the bench and 3 on the active, you aren't OHKOing base 190s/210s.