Often, permanents don't need to have a ton of charge counters on them (and in some cases, you'll actively want them removed), which can easily be done before using populate to copy a creature token you have
Having Bountiful Artemis can let you draw a card to replace each of them, but having Card of Demise can help you to draw Bountiful Artemis in the first place or just get enough Traps to counter your opponents onslaught
The more life you gain, the more Prize Pig gives
This will give you an idea of what colors will be able to fill out your deck
So, you want to buy and hold the truly special cards of the most iconic Pokmons, which are almost guaranteed to keep their value and prestige for a long time
Want to take your chances and potentially pull other cards on this list, though