In this video, I played against two decks using my Greninja deck.
Greninja Ex and the normal 3 star have abilities that are beneficial to this deck. I use pyukumuku in this deck as a chip damage so that I can deal damage with Greninja itself.
Rescue scarf is needed because the setup to get Greninja to stage 2 again can be refreshed quickly when Greninja is knocked out. This can be easily sent to the active spot by greninja’s ex ability or can deal chip damage again with the normal 3 star.