They aren't "competitive" in the sense that you'd never use these decks in standard, but that's the beauty of theme mode: you'll only be competing against other, equally powerful theme decks
Avacyn, Angel of Hope is a mono white commander available in Magic: The Gathering
Giovanni's Persian #8 (Pokemon Gym Challenge | Pokemon Cards) prices are based on the historic sales
Even if you dont use Michiko Konda as your commander, it is still an excellent choice in the 99 or other white control strategies
While you might get lucky and find this product in the wild for a much more affordable price than what you can get it for online, currently online its going for $215
It's an impressive bundle of packs, and you'll get a variety of expansions, making that chase for the best Pokmon cards even more fun