I guess they both work with the creatures with mana value 5 or greater theme, but I personally think they feel really out of place, both mechanically and thematically
Color Identity: B, R, G, W Cards All Will Be One Vraska, Swarm's Eminence Starfield of Nyx Basilisk Collar Initial Card State All permanents on the battlefield
skip SEC Ace and Blackbeard, which settled under $50 raw and no longer clear the grading cost math
This means it's not possible to cheat creatures into play out of nowhere (which madness can do), but it also means you're granted more flexibility, because you can cast a spell for its mayhem cost at any point during the turn in which it was discarded (rather than having to choose immediately as per madness rules)
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Some pawn shops may buy Pokmon cards, especially if they are valuable or rare