If you thought First Edition Charizard was bad... Think again.

Pokemon: Pikachu Illustrator
Price: About $20,000
"Gotta catch 'em all" claims the catchphrase of this celebrated franchise. Doing that with Pokemon trading cards, though, might require a second Pokemortgage.
The rarest find in the game — the belle of the Pokeball, you might say -- is this Pikachu Illustrator card. Never officially sold, never released in English, and worth somewhere around $20,000, the cards were given away as prizes in a Japanese drawing contest and only four are thought to exist. Good luck finding one — and good luck paying it off.

Pokemon: Charizard, First Edition
Price: $2,000-$2,500
The fierce, fire-breathing Charizard is a familiar face to any Pokefan, but his corresponding trading card is a much rarer sight.
Holographic versions from the first edition of the Pokemon game, printed in 1999, can easily be worth thousands if in pristine condition. It might be tricky finding such loot -- plenty of cards out there purport to be in mint condition, but only a few actually make the cut and are worth the dough.
Still, with tons of hit points and a devastatingly powerful attack, this particular collectible isn't just a treasure -- it's a potential game-winner to boot.