Alright so I'm doing the math right here right now. If It's not the most damage possible well rip. I'm also basing this off PTCGO unlimited, mostly because I'm not going through all cards from base-bus to see whatever gets the damage going, that said here it goes. (and I will go into detail but the end damage will just be at the bottom)
IF I MAKE ANY MISTAKES LET ME KNOW. I will go of perfect rng with everything set up 100% correctly.
Conkeldurr has a base hp of 140 and +20 for EACH fighting energy attached. this can give it a total of 1270hp (56 energy + base 140). The reason for 56 is because you will take 5 prizes to get the maximum amount of energy on the board + Iris.
Tyranitars attack does 110 + 60 more for each damage counter on the pokemon. Now the first thing that's important, is getting 126 damage counters on conkeldurr. So the way I thought of it, Hypno toxic laser + seviper. (I don't use frozen city for another reason later). Using hypno toxic laser + 1 seviper will cnacel any hp conkeldurr gains from it's ability. which is perfect. however we still have to deal another 130 additional damage, to cancel out it's starting hp of 140. this could be fixed by placing a 2nd seviper 13 turns before we actually attack, so it'll deal enough to have the maximum amount of damage counters. BUT we can boost it even further.
Mew-ex hits for weakness DOUBLING the amount of damage dealt. and to go on that, vileplume wit "allergy panic" to deal 4 times damage.
Now another thing is, we still need conkeldurr to get exactly 5 prizes. the easiest/most card efficient way to do this is 2 ex's / 1 basic. in this case I'll be using 2 jolteon-ex and an alolan geodude. which all get oneshot by conkeldurr without a problem. so.. 5 prizes taken. and I'm only at 16 cards in the deck. Now let's add iris/plusspower. giving another 90 damage boost (or 360 x4). but on to magnezone (dual brains). which means you can use 2 iris, so + another 50 (200). 4 puzzle of time + 4 junk arm + dowsing machine to get to another 9 pluspower or (360) damage. now to use junk arm/dowsing machine we obviously have to discard 2 cards, BUT this could be solved by 2 exeggcute. Another simple way of dealing damage is the simple 1 muscle band. +80 with x4 weakness. Now there's 1 more way of boosting damage that I could think off empoleon from Breakthrough. But we have to take a look at our bench space here. 1 M tyranitar, 1 mew -ex, 1 vileplume, 1 magnezone + 2seviper.. no more room for Empoleon :c HOWEVER, SKY FIELD. With this we can bench 3 empoleon boosting by another 60 (or 240). but now... That's really ALL I could find on damage boosting, we cant use strong energy cause nothing is fighting type so really all we have to do now is add pure consistency. Also we have to consider that 6 of our cards will be prized, but we will just go by that none of these important cards are. the thing is, I can't add any cards to go through my deck any fast. simply because that would mean my opponent gets less turns therefor, less energy therefor less damage. so really all we can do is up the numbers of what we already got.
This is the deck
****** Pokémon Trading Card Game Deck List ******
##Pokémon - 28
* 1 Tyranitar-EX AOR 91
* 1 M Tyranitar-EX AOR 92
* 2 Exeggcute PLB 102
* 2 Oddish AOR 1
* 1 Gloom BUS 5
* 2 Vileplume BCR 3
* 1 Alolan Geodude GRI 40
* 2 Jolteon-EX GEN 28
* 2 Magnemite BKT 51
* 1 Magneton BKT 53
* 2 Magnezone PLS 46
* 1 Mew-EX DRX 120
* 2 Seviper BUS 50
* 3 Piplup BKT 36
* 2 Prinplup BKT 37
* 3 Empoleon BKT 38
##Trainer Cards - 26
* 2 Hypnotoxic Laser PLS 123
* 4 PlusPower UL 80
* 2 Iris PLB 81
* 4 Puzzle of Time BKP 109
* 4 Junk Arm TM 87
* 1 Dowsing Machine PLS 128
* 2 Muscle Band XY 121
* 1 Sky Field ROS 89
* 2 Tyranitar Spirit Link AOR 81
* 4 Rare Candy PLB 85
##Energy - 6
* 3 Darkness Energy HS 121
* 3 Double Colorless Energy GRI 166
Total Cards - 60
****** Deck List Generated by the Pokémon TCG Online
www.pokemon.com/TCGO ******
(IF I MISSED ANYTHING LET ME KNOW) Now the fun part, the damage. First of all let's see how many boosts we actually got without any weakness. We got base 110 + (126x60) = 7560 + 2 iris (100) + 13 pluspowers (130) + 3 empoleon (60) + muscle band (20) = a total of: 7980 damage. now because you would attack with mew and allergy panic is up. This would become a total of a whopping:
31,920 damage.
EDIT: I realized you can't attach 56 energy. You start with an opening hand of 7 (given that 3 of those are pokemon) and you can really only attach the top decks. so it's already -4 and -5 because prize cards you take also shouldn't be attachable. so really you can only attach 47 energy which means a total of 1-7 damage counters. given this fact we can calculate that the total amount of damage should be:
27,360 damage.
Still a lot but not as much
