Multi Part Order of Operations Question (A bit complicated)

[LOLZ]

Player A has a Pokémon with 70hp left. Fighting Fury Belt is attached
Player B attacks using Shaymin ex’s Sky Return, does 30 damage and returns to the hand.
Player A’s Pokemon is still alive due to Fighting Fury Belt (40 HP left)
Player B promotes Yveital (BKT) with the Fright Night Ability which shuts off tools
Player A’s Pokemon now has exactly 0 HP because the tool is shut off
Player A’s Pokemon is now KO

QUESTION- Player A’s Pokemon is knocked out during Player B’s turn, correct? Meaning Teammates can be played by Player A?

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Same Scenario, but Player A played Hex Maniac during their last turn, so now all abilities are shut off until the end of Player B’s turn.
Player B promotes Yveital (BKT) with the Fright Night Ability which shuts off tools
Player A’s Pokemon (for the moment) is still alive with 40 HP left as the ability is off.
Player B’s turn is now over

Once Hex Manic is no longer in effect and Fright Night is in effect Player A’s Pokemon will have exactly 0 HP because the tool is shut off

QUESTION- Player A’s Pokemon is not knocked out during Player B’s turn, correct? Meaning Teammates can not be played by Player A?

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Now lets make it more complicated, lets throw in a Serperior with Royal Heal

QUESTIONS- Can you elaborate on the timing of events in this situation? When exactly does Fright Night turn back on? Do you check for Knockouts before applying in-between turns effects as well after applying them? Would an ability such as Serperior’s Royal Heal save Player A’s 0 HP remaining Pokemon before the KO Check occurs.

The root I am trying to get at is is Hex Manic turning off and tools turning off considered an inbetween turn effect? Or does this happen (along with KO checks) at a point between Player B’s turn and inbetween turns?

 

[PokePop]

First one is easy. It is turned on during the turn, so the KO happens during the turn, and Teammates can be played the next turn.

Hex Maniac stops working at the "end of turn" so Fright Night turns on as the between turn phase starts, the Fury Belt effect gets turned off during the between turn phase and the KO happens between turns. So Teammates can not be used the next turn.

Timing doesn't matter in between turns. You don't check for KOs until all between turn effects and events have been taken care of, so even if Fighting Fury Belt turns off first, you still can use Royal Heal to reduce the damage counters on the Pokemon and save it from being KO'd.