These types of decks are typically called Cheerios, and have seen play in competitive formats in the games history
Wargamer has a dedicated guide to Pokmon card rarity covering the basic rarity levels of cards you can open in any pack
Each Commander Deck set includes 4 ready-to-play deck of 100 Magic cards (2 Traditional Foil Legendary Creature cards, 98 nonfoil cards), a 2-card Collector Booster Sample Pack (contains 1 Traditional Foil or nonfoil special treatment card of rarity Rare or higher and 1 Traditional Foil special treatment Common or Uncommon card), 1 foil-etched Display Commander (a thick cardstock copy of the commander card with foil etched into the cards border and art), 10 double-sided tokens, 1 Helper card, 1 deck box (can hold 100 sleeved cards), 1 strategy insert, and 1 reference card
Theres a few other notable cards, like Recurring Nightmare and Mind Over Matter, but the value drops off steeply after that
Thats a huge win
If any collectors are sitting on a goldmine of classic Pokmon cards, now could be the best time to sell