If my Snorlax is affected by its "Thumping Snore" attack but then on my opponent's turn they use an effect that puts Snorlax to sleep, does the 2 coin flip effect of "Thumping Snore" get replaced by the regular 1 coin flip effect during Pokemon Checkup?
The newer sleep condition would replace Thumping Snore’s sleep condition, so you would now only have to flip 1 coin instead of 2.
Source: TPCi Rules Team (2022-09-08)
When Snorlax uses its "Thumping Snore" attack, how long does the effect of having to flip 2 coins during Pokemon Checkup while Asleep last?
The effect lasts either until Snorlax wakes up or it moves out of the Active Spot.
Source: TPCi Rules Team (2022-09-08)