Say I have Slaking with "Lazy" as my Active Pokemon and my opponent has Wobbuffet with "Bide Barricade" as their Active Pokemon; also my opponent has Garbodor on the Bench and currently "Garbotoxin" is disabling all other Abilities. If I play Field Blower to discard the Pokemon Tool from Garbodor so "Garbotoxin" is no longer in effect, does my "Lazy" or my opponent's "Bide Barricade" go into effect first?
In this scenario Lazy activates first. If Abilities activate at the same time, Abilities of the player whose turn it is activate first; therefore, Slaking's Ability activates first, since it's the player with Slaking's turn.
Source: TPCi Rules Team (2018-08-02)
Can Marshadow GX's "Shadow Hunt" Ability allow you to attack on your first turn using Pheromosa GX's "Fast Raid" attack if Pheromosa GX is in the Discard Pile?
Yes, it can because going first is part of the Fast Raid attack that is being copied.
Source: TPCi Rules Team (2018-08-02)
What happens with Jirachi {*}'s "Wish Upon a Star" Ability if Garbodor's "Garbotoxin" Ability or "Hex Maniac" are active?
Jirachi (*) is never in the zones mentioned by those cards when you use its Ability, so Wish Upon a Star will work.
Source: TPCi Rules Team (2018-08-02)
What happens if both Slaking with "Lazy" and Garbodor with "Garbotoxin" in play? Do they cancel each other out or what?
It depends on the order in which each Ability gets activated. Both Lazy & Garbotoxin require a condition in order to activate (either being the Active Pokemon or having a Tool attached), so when one of the abilities is active the other one is prevented. But if the ability gets disabled (like if Slaking is no longer the Active Pokemon or if Garbodor loses its attached Tool), then the other ability can activate even if it was previously prevented.
Source: Celestial Storm FAQ (2018-07-20), TPCi Rules Team (2018-08-02)
What do I do with Jirachi {*}'s "Wish Upon a Star" Ability if my bench is full?
If you cannot put Jirachi {*} onto the bench, you just put it into your hand but do not draw another prize.
Source: Celestial Storm FAQ (2018-07-20), TPCi Rules Team (2018-08-02)
If I use Gladion and choose to put Jirachi {*} into my hand, can I use Jirachi {*}'s "Wish Upon a Star" Ability?
Sorry, but Wish Upon a Star only triggers when you are taking it as a face-down prize card, not when you are trading it with another card.
Source: TPCi Rules Team (2018-08-02)
What are the rules for using Banette GX's "Shady Move" Ability?
You can move 1 damage counter from any Pokemon in play to another Pokemon in play; it can be different player's Pokemon or it can be the same player's Pokemon (either you or your opponent).
Source: Celestial Storm FAQ (2018-07-20), TPCi Rules Team (2018-08-02)
If there is more than one Banette GX in play can the player perform "Shady Move" more than once (i.e. perform Shady Move with active, then retreat, switch, etc., perform it again with the new active)?
Yes, you could do that. However, going to the bench does not allow the same Banette GX to do Shady Move again; you are limited to one Shady Move per Banette GX per turn, assuming you can get them into the active slot.
Source: Celestial Storm FAQ (2018-07-20), TPCi Rules Team (2018-08-02)
If you move Metagross with the "Extend" Ability to your bench after playing Steven's Resolve, will your turn immediately end?
No, Extend only prevents your turn from ending as a result of playing Steven's Resolve, after which your turn simply continues as normal.
Source: Celestial Storm FAQ (2018-07-20), TPCi Rules Team (2018-08-02)
Can Choice Band be used to get around Mr.Mime GX's "Magic Evens" Ability that blocks even amounts of damage?
Yes, the Choice Band and all other effects that may adjust the attack total are factored into the amount of damage being done before Mr.Mime GX's Ability is checked.
Source: Celestial Storm FAQ (2018-07-20), TPCi Rules Team (2018-08-02)