This card is awful in the current format.
I don't mean to be harsh, but Stage 2 attackers are pretty much a thing of the past right now. For a Stage 2 to even hope to come close to working, it needs to have something extremely good going for it...and this one doesn't (heck, the good stage 2 attackers that are currently legal like Empoleon are seeing absolutely zero play right now). Hitting 170 or 180 doesn't instantly make a card good like it used to, especially with the popularity of mega Pokémon. To make matters worse, this thing can't even be streamed--you have to feed it two energy every turn to attack at all, and once the first or second one goes down, you won't have 3 energy to attack with the next one (assuming you even get 3 Kingdra up--without level ball, getting multiple Stage 2's out quickly is very difficult. Add a not-so-good fairy weakness and you have a card that is slow, weak, and outclassed.