Marowak is an awful Zekrom counter. Besides you do not need one, since Cinccino easily OHKOs Zekrom after it has attacked once.
Pichu is horrible with Cinccino. With Jumpluff it might work, but not Cinccino. Filling up your own bench is not hard at all, and helping your opponent to set up is just stupid.
You'd be surprised how hard it is to fill up your bench, and keep it filled up consistently in this format. You can't forget, we no longer have Uxie, or Azelf. That is 3 Spaces that we could have on our bench, and there not be a problem. Now we only have the Babies, and the basics to our main attackers.
I ran Simisear/ Cinccino just to test it out, and I ran so many cards to get basics. Even then, I would run out of pokemon... Now you could try Revive, but that wont help when trying to get your stage 1's back. I think Pichu is a nice card, especially decks that need the bench space.
It is definitely worth trying, and don't be shut down because somebody told you it was a BAD idea. I ran Yanmega Cinccino, and really, it only had a big, BIG, problem with Magnezone... Which means it isn't too good, but against just about every other deck you do good
Idk about Reshiphlosion though... Judge won't help you in that match up lol. Unless you don't let them set up