If you can get a Mad Hatter, Gracious Host down after turn five, you'll almost always get to draw one or two more cards, which can give you a big card advantage over your opponent, especially if your Flynn Rider forced them to discard from their hand
WotC held licenses for both franchises and this unusual combination resulted from that arrangement
While we still think the Pokeball packaging is gimmicky and also a sure-fire way to scuff up the contents inside, we hope the extra time taken by Pokemon helped resolve these concerns
And all that without so much as a new keyword mechanic
Black does have some ways to exile and bring back creatures, though
Prices are on a decline right now, so many of these cards were over the $10 mark some time ago