You can also imprint the card on Isochron Scepter to reuse the effect
There are subcategories within these rarities that make things a bit more complicated, but at the most basic level you can determine rarity at a glance by looking at the symbol to the right of the collector card number
All my best and most powerful games involved sticking one of them early and keeping it in play for a while

Social & Friends - Add friends and build your trading network - View your friends collections, decks, wishlists, and trade lists - Share your lists and discover new cards through your network Scan Pokmon Cards Instantly - Instantly scan cards in any language using advance image recognition - Real-time translation of foreign cards - Check daily prices from TCGPlayer and CardMarket - Explore 30-day price history charts for any card - See format legality, oracle text, and official rulings Manage Your Collection - Organize your Pokmon TGC cards into folders with custom images - Track the value of your folders over time - Export your collection to csv or text format for backups or trading - Use smart filters to sort cards by set, color and more - Built-in card price tracker for you entire Pokmon collection Build Decks - Create and manage Pokmon TGC decks and sideboards - Export decks to csv or text for tournaments or sharing - View deck stats by mana curve, color, type, and more - Perfect for casual and competitive Pokemon deck builders Trade With Confidence - Compare trade values between two players instantly - See whos winning or losing the trade, and by how much - Use trade lists and wishlists to keep deals organized Track Price Trends - See which Pokmon cards have increased or dropped in price - Filter by date, format, or set - Track pricing trends within your own collection Weekly Email Updates - Receive weekly email summaries with your collections stats - See value changes, collection growth, and other insights

Genome Hacking already allows you to copy some of the most powerful Moves in the game for only three Energy