Can I use Urn of Vitality to shuffle the card Impact Energy from my discard pile into my deck?
No, you cannot. Urn of Vitality is only able to target a specific card named "Single Strike Energy". Although Impact Energy is a "Single Strike" Energy card, it is not "Single Strike Energy".
Source: Chilling Reign FAQ; TPCi Rules Team (2021-06-17)
Can I use Houndoom's "Single Strike Roar" Ability to search my deck for the special energy card Impact Energy?
No, you cannot. Single Strike Roar is only able to target a specific card named "Single Strike Energy". Although Impact Energy is a "Single Strike" Energy card, it is not "Single Strike Energy".
Source: Chilling Reign FAQ; TPCi Rules Team (2021-06-17)
Can I use Houndoom's "Single Strike Roar" Ability if all four Single Strike Energy cards are in play or in the discard pile?
No you cannot. Since the location of all four Single Strike Energy cards are known, there's no way Single Strike Roar would be able to find one during a deck search.
Source: TPCi Rules Team (2021-03-25)
If Dusknoir with the "Spectral Breach" Ability gets Knocked Out while Recycle Energy is attached to it, does the Recycle Energy go back to my hand or not?
No, Spectral Breach is still in effect when the cards are going to the discard pile, so the Recycle Energy would be discarded.
Source: TPCi Rules Team (2020-11-12)
Does Galar Mine add {*}{*} to the Retreat Cost of a Darkness Pokemon with Hiding Energy attached?
Nope, if a Pokemon's Retreat Cost is set to zero by an effect such as Hiding Energy, it cannot be increased by Galar Mine.
Source: Darkness Ablaze FAQ (2020-07-31), TPCi Rules Team (2020-08-13)
When using Centiscorch VMAX's "G-Max Centiferno" attack, can I get a Heat Energy from my discard pile?
No, you may not. Heat Energy only counts as a Fire Energy card while it is attached to a Pokemon, not when it is in the discard pile or anywhere else.
Source: TPCi Rules Team (2020-08-13)