Can you attach more than one tool of the same name to Sigilyph with the "Toolbox" Ability? And if so, do the effects of the tools stack?
Yes to both questions.
Source: TPCi Rules Team (2013-08-15)
If Sigilyph with the "Toolbox" Ability has Plasma Badge and Reversal Trigger attached, do I get to search my deck for a card when it is KO'd by an attack?
Yes, you can. The tools are still present on the Pokemon when it's KO'd (assuming the attack does not discard the tools first), so you would get to use the effect of Reversal Trigger since Plasma Badge makes Sigilyph a Plasma Pokemon.
Source: TPCi Rules Team (2013-08-15)
What happens if you play Ghetsis but your opponent does not have any Item cards in their hand?
Your opponent shuffles their deck (even though they did not put any cards into it) and you do not get to draw any additional cards.
Source: TPCi Rules Team (2013-06-20)
If I use Deoxys-EX's "Helix Force" attack against a Pokemon with a DCE attached, does it do 30+60 damage?
If Deoxys-EX has the required Plasma Energy attached, it does 30+60 damage. The extra damage, as the card says, is 30 for each energy attached to the defending Pokemon, and DCE provides two energy.
Source: TPCi Rules Team (2013-06-20)
If I use Victini-EX's "Turbo Energize" attack but choose to attach the two Basic Energy cards from my deck to Sigilyph with "Safeguard", what happens?
Sigiliph is a valid target for the choice of Benched Pokemon, but since Safeguard prevents all effects of attacks done by Pokemon-EX the energies would be discarded rather than attached to Sigilyph.
Source: TPCi Rules Team (2013-06-20)
If I already have four Fire Energy cards in my Discard Pile, can I use Superior Energy Retrieval to discard two Fire Energy cards from my hand and retrieve the other four from my Discard Pile?
Yes, you may retrieve the other four. The restriction is you cannot return any of the cards to your hand that you used to pay this card's cost.
Source: Plasma Freeze FAQ (2013-05-16), TPCi Rules Team (2013-05-16)
How does the stadium card Frozen City interact when a player attaches Double Colorless Energy to a non-Team Plasma Pokemon?
You only place 2 damage counters because there was just one attachment, even though the attachment provided multiple energies.
Source: TPCi Rules Team (2013-05-16)
With Raticate's "Transfer Junk" attack, what if I don't have all 3 types of Team Plasma cards, Pokemon, Trainer & Energy in my discard?
Take one of each type that you do have.
Source: Plasma Freeze FAQ (2013-05-16), TPCi Rules Team (2013-05-16)
Can I use "Signs of Evolution" to get two of the same cards that evolve from Eevee if I don't have 3 different ones in my deck?
No. Each one you take out of your deck must be a differently typed evolution of Eevee; you may not retrieve more than one Pokemon of the same type.
Source: Plasma Freeze FAQ (2013-05-16), TPCi Rules Team (2013-05-16)
Can I use "Signs of Evolution" to get a Vaporeon and a Glaceon from my deck?
No, you may not. Vaporeon & Glaceon are both Water types, and the three Pokemon retrieved by Signs of Evolution must all be different types.
Source: Plasma Freeze FAQ (2013-05-16), TPCi Rules Team (2013-05-16)