Prefer an eco-friendly approach
In all honesty, this is only a drop in the bucket
1 2 "Pokemon Trading Card Game for Game Boy Color"
Kirlia Genetic Apex Uncommon Element Psychic Stage Stage 1 HP 80 Weakness Darkness Retreat 1 Artist
What these apps are especially good for too, is finding other card collectors to connect with and buy and sell cards
The closest I could find to anybody doing it in the mainstream recently was Artifact (I know, I know, I'm stretching the word "mainstream" here) with a slightly bastardised version of the concept handled via Steam's marketplace, and even then it's still an online auction house, not just doing fun swaps with your pals and saying "well I've got this, what've you got?", like exchanging the best parts of your packed lunches at school