According to the official Pokmon TCG Tournament Rules, all cards in a deck must not be marked or altered in any way. This includes marked cards, which are obviously illegal because of cheating, but also "cards that have undergone post-production alteration
I could easily imagine moving it to the maindeck, and depending on the shape of the format, its not even clear we couldnt play multiples
Yes, part of that is related to the search for the One of One Ring, but its also due to the popularity of this IP
Just like all Pokemon sets, there are a fair few cards that aren't worth all that much, but on average, cards from the 1st edition release sell for a hefty sum
A Reverse Holo
The non-foil could be bought for 12 tickets at Atlanta, and 360 tickets at Lille