Do I have to have Tool cards in my discard pile in order to use Rotom V's "Scrap Short" attack? Or if I have Tool cards in my discard pile, do I have to choose at least one of them to put into the Lost Zone?
You can use Scrap Short if you don't have any Tool cards in your discard pile. Scrap Short does not require you to put any Tool cards into the Lost Zone; if you cannot or choose not to put any Tool cards into the Lost Zone it only does the base amount of damage.
Source: Lost Origin FAQ; TPCi Rules Team (2022-09-08)
When using Delphox V's "Magical Fire" attack, do I still have to put 2 Energy attached to that Pokemon if my opponent doesn't have any Benched Pokemon?
Yes, you must still put 2 Energy into the Lost Zone when using Magical Fire.
Source: Lost Origin FAQ; TPCi Rules Team (2022-09-08)
If I have 5 cards in my Lost Zone and my opponent has 5 cards in their Lost Zone, can I use Sableye's "Lost Mine" or Giratina VSTAR's "Star Requiem" attack or Fantina?
No. Each player has a separate Lost Zone above their Prize Cards that they put cards into. You yourself must have 10 cards in your Lost Zone in order to do either of those attacks or to play Fantina.
Source: Lost Origin FAQ; TPCi Rules Team (2022-09-08)
If I have a Poliwrath on my bench that evolved from a Poliwag and a Poliwhirl do I get all of the damage bonuses for each of them?
No, you only look at the most evolved stage of a Pokemon in play. The previous stages are now part of that Pokemon.
Source: Lost Origin FAQ; TPCi Rules Team (2022-09-08)
If I have multiple Poliwag on my bench, does Politoed's "Lordly Songleader" attack do additional damage for each of those Pokemon?
You only get the additional bonus once per Pokemon named in the attack. For example, if you have two or more Poliwag on the bench you only get to add +60 once.
Source: Lost Origin FAQ; TPCi Rules Team (2022-09-08)
If I have a Poliwag and a Poliwhirl and a Poliwrath all on my bench, does Politoed's "Lordly Songleader" attack do additional damage for each one?
Yes, you get the additional bonuses once per Pokemon named in the attack, which you have on your bench.
Source: Lost Origin FAQ; TPCi Rules Team (2022-09-08)
If I use Shiftry's "Fan Tornado" attack and my opponent has an Active Pokemon that used its "Swim Freely" attack on their last turn, can I still choose to have them switch their Active Pokemon with a benched Pokemon if they flipped heads for "Swim Freely"
No, the effect of Fan Tornado is targeting the Active Pokemon (not the Benched Pokemon), and therefore is prevented due to the effect of Swim Freely.
Source: Lost Origin FAQ; TPCi Rules Team (2022-09-08)
If I use Hisuian Zoroark's "Doom Curse" attack and my opponent switches or retreats and brings up a new Active Pokemon, which of their Pokemon will be Knocked Out at the end of their next turn?
Neither! The effect of Doom Curse was on the attacked Pokemon and going to the bench removes all Attack Effects. So after the switch/retreat the Doom Curse effect is gone.
Source: Lost Origin FAQ; TPCi Rules Team (2022-09-08)
Aerodactyl VSTAR retains the effect of its "Ancient Star" attack even if it goes to the Bench or becomes Active. If an effect like Path to the Peak stadium shuts off Abilities then Ancient Star is turned off, but if that effect goes away, the Ancient Star Ability returns. It will also count toward the number of Pokemon with an Ability in play.
Source: Lost Origin FAQ; TPCi Rules Team (2022-09-08)
If I use Parasect's "Lethargy Spore" Ability after a Pokemon has been attacked by Dustox's "Nadir Powder", how many counters are placed on the poisoned Pokemon during Pokemon checkup?
Lethargy Spore resets any specific number of damage counters for Poison to 1, therefore overriding Nadir Powder's effect of 8 damage counters for Poison.
Source: Lost Origin FAQ; TPCi Rules Team (2022-09-08)