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)
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 my opponent mulligans several times during setup, may I choose to take 1 card from the top of my deck, look at it, and then decide whether to continue drawing my next mulligan?
When drawing cards for mulligans you must announce how many cards you are going to draw, up to the maximum allowed. If you don't announce a number ahead of time, then you must draw the maximum amount. You don't get to look and decide as each card is drawn.
Source: TPCi Rules Team (2015-11-19)
Can I evolve to a BREAK Pokemon while it is on the bench?
Yes. If follows the normal rules of Evolution.
Source: BREAKthrough FAQ (2015-11-19), TPCi Rules Team (2015-11-19)
When constructing a deck, am I limited to 4 total Raichu, including Raichu BREAK?
Actually, BREAK is part of the Pokemon's name. So you can play up to 4 Raichu and up to 4 Raichu BREAK in your deck.
Source: BREAKthrough FAQ (2015-11-19), TPCi Rules Team (2015-11-19)
For Swoobat's "Returning Echo" attack, if it is my only Pokemon in play do I have to flip a coin for the attack?
Yes, and if you get tails your Swoobat will leave play and you will have no Pokemon remaining on the field.
Source: BREAKthrough FAQ (2015-11-19), TPCi Rules Team (2015-11-19)
For Xerneas' "Power Creation" attack, do I need to heal all damage from Xerneas in order for the attack to do +80 more damage, or can I just heal some damage in order to get the benefit?
As long as you have healed any damage from Xerneas this turn, you get the bonus damage effect.
Source: BREAKthrough FAQ (2015-11-19), TPCi Rules Team (2015-11-19)
For Xerneas' "Power Creation" attack, does moving damage counters off of Xerneas to another Pokemon count as "Healing"?
No, moving damage counters off a Pokemon is not the same as healing damage (similar as to how moving damage counters onto a Pokemon is not the same as doing damage to it).
Source: BREAKthrough FAQ (2015-11-19), TPCi Rules Team (2015-11-19)
What happens to Piloswine's "Gathering Footsteps" attack if Mamoswine has a Float Stone attached to it?
Float Stone reduces Mamoswine's Retreat Cost to zero, so you would not get to add any damage from it for Gathering Footsteps.
Source: BREAKthrough FAQ (2015-11-19), TPCi Rules Team (2015-11-19)