For those thinking Alolan Ninetail BUS will be a huge hinderance against EX/GX decks, let me give you a comparison. Sigilyph from Dragons Exalted. The reason This Sigilyph was so powerful, was because the top decks at the time were pure EX with no Non-EX attackers. It not only was the wall, but also the offensive Pokemon in the deck as well. People adjusted and put non-EX attackers into every one of their decks. Suddenly the deck stopped topping as much. Ninetails BUS however, doesn't have the same luxuries. Cobalion, Gallade, Garbodor, Yveltal, Vikevolt, and Volcanion. All non-EX/GX attackers that are already being played and all of them can OHKO Ninetails very easily. Not to mention that Ninetails is a pure wall, with no offensive power. The most you're looking at is 110 with a Band, which isn't a lot for the card. This card has to stay in the active spot, but has no disruption in the current format, so it can easily be taken out. And the more turns that card is up front, the more turns I have to set up my deck, because it's not a threat to me. Not to mention it's easily played around with Guzma. As a one-of, you may get lucky and stall a game, but overall, it's not worth playing.