Pokemon Trading Card Game 2: Great Rocket Attacks. There’s a translation and I’m playing it on a retroconsole.

It’s literally a “MORE OF IT!” sequel in the same engine to Pokemon TCG, except with twice the cards, a second island, and all of the old content is eventually available. They also improve on some AI quirks, and nearly all characters now have three portraits to show happiness and sadness. Also, the opponent decks are tremendously more well thought out (ez example: Electric users usually also have bird pokemon that resist the Fighting/Ground decks you’re going to bring against them) so you could pretty much see it as a full blown DLC Sequel. It’s also longer, way longer.

I wish I had this game as a kid. I have no idea why they didn’t export it outside Japan. Pokemon Stuff was selling for truckloads between gen 1 and 2.