I dont think Pokemon can ever have an equivalent to the Power 9, because the most-used trainers (eg Bill, Computer Search, Plus Power, Rockets Sneak Attack] in the original era dont have the same iconic factor to collectors today
Smaller decks are easier to learn and master for beginning players, easier to construct and test for brewers, and easier to handle, search, and shuffle for everyone
The first printed sets of Japanese base set cards dont feature any rarity symbol like their English-language counterparts, but are still some of the most expensive Pokmon cards on the market
+6000 Power and Double Attack means we can use that Character as a win condition, threatening to take 2 Life cards if we go for a high-power attack, putting our opponent at low Life cards for our other attackers to finish the job
9 Dragon Master Magia $131.41 This is the only non-Starlight Rare on this list, and it's no coincidence that its Starlight variant places very highly on this list