Powder Spray vs. Power Spay vs.
Power Spray
They should simply state the power, then start to use it.
The player who has spray, should be ready to spray
DFB nailed both sides of play. Do it just like that.
However, it was played differently at Worlds and maybe Nats, where the judge announcements said that the player calling the power needed to wait a 3-5 seconds, which was IMO 1) an enormous invitation to he said/she said and 2) very close to requiring a player to ask permission/coach the opponent. TO/HJ should let the players know how they're going to call Power Spray at States & Regionals.
The only statement in the official rulings is that you must say or indicate your power before its use. If you have Power Spray, you will need to, in that moment, either say "Power Spray" or "wait!". You're entitled to a moment to consider if you want to use it, especially on an unexpected Power (Baltoy, BTS, Claydol, "Cosmic Power").
On the other hand, just taking the action, with no indication or announcement, is against an official ruling. And the announcement/indication should be distinct from the action, e.g. if two players were disputing about Spray and the one had had his hand on the deck while announcing Set Up, that would be a factor in the ruling.
I have the "Right of Way" so I'm just gonna perform the effect. I'm not going to look at my opponent and wait for a reaction.
You have the right of way once you announce it. I wont for a reaction, but I will be glancing at my opponent to see if they got my communication.
Dubious Game Actions
Nope. He had no Dusknoir in the deck. It was a deck that often played Dusky. The intent was to get the benefit of the opponent keeping their bench small without having to commit the deck slots to the actual cards.
I dunno, that DQ sounds awfully lawyery to me.
OK, back to being serious: I was at ground zero of one event that prompted the rule about dubious game actions. That experience left a mark, but we learn from things like that. Don't close
your mind or get all lawyery yourself on this issue. Don't think that because the seminal event involved a card that was almost put in play, that the rule doesn't apply to cards that aren't in play, other actions not involving cards, or statements made at the table about the game.
Did that Dusknoir kid learn that fake-out from some well-known person who did likewise, a judge arguing in favor of the legality of this deception on a board somewhere, a relative or elder pal who was showing him how he takes in the noobs, or just maybe he made it up on his own? I'd feel like a rat if my bravado or lawyeryness was a factor in getting that kid get DQ'd.
Talking about your strategic feint or bluff?
Don't listen to anyone arguing that a judge can't take into account your words as
part of assessing sportsmanship/cheating issues.
The example 'talk' in the lead post is insignificant and not worth writing about as much as has been typed here. However, if someone says, "That's unquestionably OK and no one can touch you for that," they forget those words are potentially part of a bigger picture in assessing a penalty. Also, someone might miss the point and go too far. To repeat, it's not only unnecessary and might blow the whistle on your strategy, but also creates penalty risk.
No one is going to call a penalty on you for failing a single Premiere ball search. 'Shoot' might bring closer scrutiny, or be part of confirming a pattern, but by itself is nothing. However, if you slip and say, "Ah, my Luxray is prized," when it isn't, then you have just put your tongue in the light socket; better hope that the switch stays off. Just saying that might prompt a judge to turn on the light and take a look.