Once during your turn (before your attack), if Blastoise is your Active Pokémon, you may flip a coin. If heads, discard an Energy card attached to Blastoise, if any. Then, if there are any Energy cards attached to the Defending Pokémon, choose 1 of them and discard it. This power can't be used if Blastoise is affected by a Special Condition.
Energy Cannon エナジーキャノン
40+
Does 40 damage plus 10 more damage for each Energy attached to Blastoise but not used to pay for this attack's Energy cost. You can't add more than 20 damage in this way.
e-Reader data
The card ID of the Holofoil print is B-77. The card ID of the Non Holofoil print is B-77-#. On the Non Holofoil print, the short strip contains Pokédex information and a brief card summary. There is no long strip for this card. The species, height, and weight are present on the Holofoil print.
It firmly plants its feet on the ground before shooting water from the jets on its back.
ふんしゃした みずの いきおいに まけないように わざと たいじゅうを おもくしているのだ。
Trivia
The Jet Stream Poké-Power was later clarified to define the Energy discard from the Defending Pokémon as dependent on a successful Energy discard from Blastoise.