If I have Floral Crown attached to my Active Pokemon, and my opponent does just enough damage to knock it out, can I use Floral Crown to reduce the damage so it is not Knocked Out?
No. You have to resolve all effects and triggered results from the attack first, including Knockouts and taking Prizes. After that, if the Pokemon with Floral Crown is still in play, then you would heal 20 damage. It will not save a Pokemon from a Knock Out due to an attack.
Source: TPCi Rules Team (2016-02-11)
If I have a Hard Charm attached to Talonflame and use its "Jet Shoot" attack, then next turn my opponent does a simple attack that does 20 damage, can I pick the order of when to apply the Hard Charm's -20 reduction and "Jet Shoot's" +40 recoil? If I use Hard Charm to reduce the net damage to zero (20-20), could I then negate the "Jet Shoot" recoil?
No, it doesn't work like that. The check for effects on the defending player's Active Pokemon, such as Hard Charm and Jet Shoot, both happen at the same step in the damage calculation process. So you don't stop damage calculations mid-step just because the calculation was less than or equal to zero. The net effect of Hard Charm & Jet Shoot result in +20 damage at that step in the calculation process.
Source: TPCi Rules Team (2015-12-10)
If I play "Giovanni's Scheme" and choose one of its effects, can I change to the other effect later in my turn as long as I haven't attacked yet?
No. You choose which effect to use when you play it and you're locked in with that effect until the end of your turn.
Source: BREAKthrough FAQ (2015-11-19), TPCi Rules Team (2015-11-19)
If the Parallel City Stadium is already in play, can either player replace it with another Parallel City card facing the opposite direction?
No. Stadium cards can only be replaced by another Stadium card with a different name; direction of the card does not matter.
Source: BREAKthrough FAQ (2015-11-19), TPCi Rules Team (2015-11-19)
Can I use Heavy Ball to search for Chesnaught BREAK since it has the retreat cost of Chesnaught?
No. While not in play, the card has no Retreat Cost.
Source: BREAKthrough FAQ (2015-11-19), TPCi Rules Team (2015-11-19)
With the "Forest of Giant Plants" Stadium in play, could I evolve from Oddish to Gloom to Vileplume all in the same turn?
Yes. Oddish can evolve into Gloom on the turn it comes into play, and since Gloom has come into play that turn the stadium would allow it evolve into Vileplume right away too.
Source: Ancient Origins FAQ (2015-08-13), TPCi Rules Team (2015-08-13)
If I play "Ace Trainer" does my opponent draw 6 cards and then draw 3 cards?
No. After you shuffle your hands in, you will draw 6 and your opponent will only draw 3.
Source: Ancient Origins FAQ (2015-08-13), TPCi Rules Team (2015-08-13)
Do Primal EX-Pokemon count as Mega Evolved Pokemon? And will they take damage if the "Faded Town" Stadium is in play?
Yes. They have "Mega" printed on them, so they will receive 2 damage counters for Faded Town.
Source: Ancient Origins FAQ (2015-08-13), TPCi Rules Team (2015-08-13)
If my opponent has a Robo Substitute on the bench, does that add 20 damage to Exeggutor's "Shake It Off" attack?
Yes, Robo Substitute counts as a {C} Pokemon while in play.
Source: Roaring Skies FAQ (2015-05-07), TPCi Rules Team (2015-05-07)
Can I use the effect of Mega Turbo on Primal Groudon EX or Primal Kyogre EX?
Yes. They do say that they are Mega Pokemon on their cards.
Source: Roaring Skies FAQ (2015-05-07), TPCi Rules Team (2015-05-07)