this pokemon card has 110 hp and has a poke body called insight what happens is if you have the same amount of cards in your hand as your opponent all of yanmega's attacks are 0 energy cost so you can use any move for free. the next move is linear attack it lets you choose any of your opponents pokemon and does 40 damage to that pokemon obviously weakness and resistance does not count for benched pokemon.
the last move is sonicboom  this does 70 damage but it isn't affected by weakness and resistance. the retreat cost of yanmega is 0