Seriously, this would be amazing and above what I expected, to be quite honest! It would also be sick to get a custom format for the Gameboy game and Gameboy sequel. If there was ever an emergence of people playing the TCG 1 on the Switch, online, this site could be used by a lot more people like they use Pokemon Showdown to practice before making the decks in-game. Anyway, just want to tell you how freaking excited I am for this feature. It opens a lot of doors and I just want to encourage it. 
To make sure we stay on topic, I’ve created a new topic to discuss my ideas: