Once you've used the attack, the Pokemon that used it is completely irrelevant. It just makes it so during your next turn, instead of 1 attachment, you have unlimited. I think you're overestimating it a little, though. Aside from the fact that you can use Special Energy with this (which gives it some niches I guess), this is actually much SLOWER than a Pokemon like Boundaries Crossed Blastoise or Breakthrough Magnezone since it requires you to use an attack. It's also a once-off, unlike a Pokemon like Blastoise or Magnezone, which you can do on multiple turns. It's realistically not going to see any play, especially after Double Dragon Energy rotates.