Each pack contains 100 sleeves so you have enough to sleeve your entire deck including your sideboard
Kingdra's second move is called Twister, for two energy cards, one each of lightning and water, this move does 70 damage, however you must flip two coins when using this move, if you get two tails, the move does nothing, for each heads you flip, you may discard an energy card attached to the defending Pokemon
You may have to rely on colorless threats or gold cards sometimes, but green has plenty of battlecruiser material to ramp into, like Old Gnawbone, Vaultborn Tyrant, or Apex Altisaur
Grond, the Gatebreaker is an interesting card, as you only need to crew it on your opponents' turns
It is still a walker though, with all the problems that brings