Regarding Plasma vs. Yveltal EX and Darkrai EX:
I just found that
Drifblim(PLB) could work as an alternative to Enhanced Hammer (only that, unlike the Enhanced Hammer Trainer card, Drifblim deals base 70 damage on top of the special energy discard effect) in the deck mentioned on topic when coupled w/ Lysandre to draw the foe you want the energy off of out if it is on bench, as it can throw away opponent's Plasma, Rainbow/Prism, and double-colorless energies. Since you can only have 4 Plasma Energies in a deck, if Drifblim is still active upon the expiration of the max amount of all 4 Plasma Energies, Lugia could be rendered useless and forced to switch and/or Cassius out of play, as it requires a certain type of special energy in order to be able to do damage on its own, while pokemon that need plasma energy/rainbow energy to do greater damage and other effects than they would have done without it, but are not required to have a certain type of special energy attached to it in order to even attack(such as Deoxys, Thundurus, Articuno, among others) would be crippled, but unless the deck has no energy left in it other than that in the discard pile while unable to be retrieved in any possible way, as long as the pokemon has the appropriate energy, they can still do damage even w/o any special energy, but if, under any circumstances, the player finds him/her self unable to attach any of the special energy type the attachee pokemon needs to carry out said bonus effects, the damage they deal would be impacted(but the amount of impact varies by card), despite the fact that you need drifloon as well in order to use Drifblim (since Drifblim is a Stage 1, while Drifloon is a basic that evolves into Drifblim), meaning Drifblim takes up 2 slots out of the needed 60. Look at the reason why Drifblim is a good addition to a Yveltal EX plus Darkrai EX deck:
1. You don't need to worry about energy type with drifblim because it requires 3 colorlesses, but, if 3+ plasma pokemon are out on opposing side, then due to Drifblim's ability, it can use its special-energy-stripping move called derail for free.
Now, here is a con for using Drifblim (PLB):
2. Drifblim(PLB) has 100 HP, so don't send it out against Mega Kanga unless you know that one Derail would mean the opponent will have no fairy/dark/rainbow energy left to transfer from Aromatisse or Hydreigon (Fairy Transfer or Dark Trance, respectively) and/or no way to get the necessary energies out of the discard pile to correct a Double Colorless loss from PLB Drifblim's Derail. It only takes one Wham Bam Punch to KO it. Other than that, in terms of Yveltal / Mewtwo and Darkrai decks, since judging from the skeleton list, I assume that the deck cannot 1HKO Mega evolutions unless you attach a lot of energy on Mewtwo/Yveltal (which could derail your victory chances if the pokemon is ko'd, because in the TCG game, all energy cards discarded w/ no way to get them out of discard=guaranteed defeat).
I think Drifblim's a good addition, do you?