Mega Zeraora is a Ninja

"Manual attach 3 times, and he's ready to go." First, you have no way to find the energies and guarantee an attachment to Zeraora for 3 turns straight. Second, Dragapult will have been fully set up by the time you get your second energy. Hero's Cape doesn't fix any math, Dragapult two-shots you anyway and decks like Raging Bolt will still find the energy to KO. Even if Dragapult has Dusknoir, which is about a third of Dragapults right now, (about 12% of the meta) they only play 1, so wow, they can OHKO 1 Zera. Now what? Maybe play an Ace Spec with more consistency like maybe Secret Box .Crustle is an abysmal matchup, so you need some way to make that matchup winnable. You could add a Dudunsparce ex to compliment your Dudunsparce line, but you'd probably have to cut a Dudunsparce. In this case Hero's Cape might be better, so you can tank more hits with the Dudunsparce ex, but I think Secret Box along with some recovery cards, which this deck has 1, will make Crustle a good matchup. You also have no targets to Zepto Turn into, and if you switch to Emolga, they just knock it out for a free prize. You could add something like Mimikyu and/or Cornerstone Mask Ogerpon ex for stall options after you Zepto Turn. Battle Cage is kind of pointless here, because you are shuffling you Dudunsparces in the deck, and it's not the end of the world if a single Eelektrik get's KO'd. If you really insist on playing it, 1 is better. This deck needs support Pokemon. Meowth, Fezandipiti, and possibly even Munkidori would all add something to the deck. Meowth for Lillie's can save you out of a dead hand, and you never know when Fez could come up to try and draw Boss for game or something like that. Lastly, Emolga can go. Sure, Call for Family can set up, but so can a single Ultra Ball or Buddy-Buddy Poffin. I actually like Emolga here, but it's more of a meme card than something you are actually going to use a lot. So play 1 if you really want, but I think Emolga is a dead card here.

I like the idea and function of this deck, and I think it could be really enjoyable to play if you take what I say into consideration. Have a good day :)