If Path to the Peak is in play, can I use Liepard V's "Hidden Claw" Ability when I play it from my hand onto my Bench?
No, Liepard V is considered in play by the time Hidden Claw activates, so it won't work due to Path to the Peak.
Source: Chilling Reign FAQ; TPCi Rules Team (2021-06-17)
If Kecleon has no Energy attached and I attach a Psychic Energy to it when Old Cemetery is in play, will Kecleon's "Chromashift" Ability kick in before checking for Old Cemetery or will Kecleon get 2 damage counters?
Old Cemetery's effect will happen first, so Kecleon will receive 2 damage counters.
Source: Chilling Reign FAQ; TPCi Rules Team (2021-06-17)
What happens if both Corviknight VMAX with "Lustrous Body" and Galarian Weezing with "Neutralizing Gas" are in play? Do they cancel each other out or what?
Lustrous Body takes precedence over Neutralizing Gas. It doesn't matter which one comes into play first.
Source: TPCi Rules Team (2021-04-08)
Say Team Magma's Secret Base and Mimikyu with "Shadow Box" Ability are both in play. If I put Dedenne GX on the Bench, can I use its "Dedechange" Ability or will it be blocked because it has damage counters on it?
Since Dedechange and Team Magma's Secret Base are simultaneous effects, it is up to the player to choose the order in which they will be applied.
Source: TPCi Rules Team (2021-04-08)
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)
Does going to the bench reset Kricketune V's "Exciting Stage" Ability?
No. Even if it leaves play and comes back, you can still only use one Exciting Stage Ability per turn even if you have 2 different Kricketune V in play. It is a Game State check, not an effect.
Source: Battle Styles FAQ; TPCi Rules Team (2021-03-18)
Does the box regarding taking prizes for KO'ing a Pokémon-ex from the EX-era (like EX Ruby & Sapphire) count as a "Rule Box" for the purpose of Empoleon V's "Emperor's Eyes" Ability?
No, the term Rule Box does not apply to anything prior to Black & White. As of the date of this ruling these things are covered by Rule Box: Pokémon V, Pokémon VMAX, Pokémon-GX, TAG TEAM, Prism Star, Pokémon-EX, Mega Evolution, and Pokémon BREAK (any future cards that may have a Rule Box are also covered.)
Source: TPCi Rules Team (2021-03-18)
If my Mimikyu V with the "Dummy Doll" Ability protection is moved to or from my Bench during my opponent's turn by a switching action such as Boss's Orders is it no longer protected?
It is still protected. It is an effect from an Ability, not from an attack, and so is not removed by moving to or from the bench.
Source: Battle Styles FAQ; TPCi Rules Team (2021-03-18)
If I play Mimikyu V with the "Dummy Doll" Ability to my Bench and then make it Active, does it keep the protective effect of "Dummy Doll", or is that removed when it moves from the Bench to the Active Spot?
You keep the protective effect of the Ability; it's not like losing an attack effect when moving from the Active Spot to the Bench.
Source: Battle Styles FAQ; TPCi Rules Team (2021-03-18)
If I have Kingdra with the "Deep Sea King" Ability on the bench and my opponent uses Heatmor's "Burning Licks" attack that discards energy cards from my Active Pokemon and also knocks it out, can I move those energy cards to Kingdra before they are discarded?
No, the discard effect of the attack happens first, but you don't move energy for Deep Sea King until after you resolve the Knock Out.
Source: Battle Styles FAQ; TPCi Rules Team (2021-03-18)