If my only Eternatus VMAX with "Eternal Zone" Ability is Active and gets KO'd, do I reduce my bench size down to 5 Pokemon before or after promoting one to the Active Slot?
You discard down to 5 Benched Pokemon before promoting a new Active Pokemon in this scenario.
Source: TPCi Rules Team (2020-08-20)
If I have Eternatus VMAX with "Eternal Zone" Ability in play and I use Devolution Spray Z to devolve one of my benched Darkness type Pokemon to a non-Darkness type Pokemon with enough damage already on the devolved Pokemon to knock it out, is it KO'd before having to reduce my Bench down to 5 Pokemon, or if I discard it to reduce my bench is it not KO'd?
You would discard your Bench down to 5 first, then check for a KO. That means you could discard the newly devolved Pokemon to avoid a KO, even if Eternatus VMAX is the one being devolved!
Source: TPCi Rules Team (2020-08-13)
Can you use Pokemon Breeder's Nurturing to evolve Pokemon if Dracovich's "Primal Law" Ability is active?
Yes, you can still use Pokemon Breeder's Nurturing since the Pokemon is coming from the deck and not from your hand.
Source: Darkness Ablaze FAQ (2020-07-31), TPCi Rules Team (2020-08-13)
If I play Crobat V to the bench and use its "Dark Asset" Ability, can I use Super Scoop Up to bring it back to my hand then put it down to use "Dark Asset" again on the same turn?
Sorry, but the ability says that you may use ONLY ONE Dark Asset per turn, this applies regardless of whether any other Pokemon have used it.
Source: Darkness Ablaze FAQ (2020-07-31), TPCi Rules Team (2020-08-13)
If I use Rhyperior V's "Drill Run" attack against a Darkrai with "Darkness Guard" Ability and only one Darkness Energy card attached, does Darkrai take 20 less damage before discarding the Darkness Energy or is the energy card discarded before the damage is reduced?
If an attack discards energy from the Defending Pokemon, the damage reduction happens first and then apply any attack effects.
Source: Darkness Ablaze FAQ (2020-07-31), TPCi Rules Team (2020-08-13)
If I have Eternatus VMAX with "Eternal Zone" Ability in play and my opponent uses Celebi's "Time Spiral" attack to devolve one of my benched Darkness type Pokemon to a non-Darkness type Pokemon with enough damage already on the devolved Pokemon to knock it out, is it KO'd before having to reduce my Bench down to 5 Pokemon, or if I discard it to reduce my bench is it not KO'd?
You would discard your Bench down to 5 first, then check for a KO. That means you could discard the newly devolved Pokemon to avoid a KO, even if Eternatus VMAX is the one being devolved!
Source: TPCi Rules Team (2020-08-13)
Can a dual-type Pokemon like Bisharp from Steam Siege (being both a Darkness type and Metal type) be played onto the bench while Eternatus VMAX's "Eternal Zone" ability is on?
Yes, as long as the Pokemon is Darkness type it can be played onto the bench.
Source: TPCi Rules Team (2020-08-13)
If I have an Eternatus VMAX with "Eternal Zone" Ability and less than 8 Pokemon (all Darkness type) on my bench, can I use Giratina's "Distortion Door" Ability to put it from the discard pile onto my bench and use its effect before it is discarded?
No, you cannot even put it onto your bench because it is a non-Darkness Pokemon.
Source: Darkness Ablaze FAQ (2020-07-31), TPCi Rules Team (2020-08-13)
If you have 2 Darkness Pokemon on the bench and an Eternatus VMAX with the "Eternal Zone" Ability, can you play a non-Darkness Pokemon onto your bench?
No, you cannot put any non-Darkness type Pokemon into play. This includes things that would put Darkness type Pokemon directly into play, not just playing them from your hand!
Source: Darkness Ablaze FAQ (2020-07-31), TPCi Rules Team (2020-08-13)
If you have 8 Darkness Pokemon on your bench including a Weavile, and you devolve it into a Water type Sneasel, can you discard just the Sneasel and stop, or do you have to continue discarding benched Pokemon down to 5?
Once you begin discarding Pokemon you must complete the full action of getting down to 5 benched Pokemon, even if you don't have any non-Darkness Pokemon on your bench any more.
Source: Darkness Ablaze FAQ (2020-07-31), TPCi Rules Team (2020-08-13)