Dual Ball is a nifty, but flippy, little card. Its effect is simple: Flip 2 coins, and for each heads, search your deck for a basic pokemon, show it to your opponent, and put it into your hand. If you're running the ever-so-popular LuxChomp, this card can be ideal, combined with Level Max, to get everything out on Turn 1 (if you go second). Attach Energy Gain to Luxray, you're doing 60 for 1. Attach it to Garchomp, and get a DCE, then you're sniping 80 for two. I'm starting to get off topic, so I'll just say that Dual Ball is very effective in that combo. It can be useful in getting out the basics you need (e.g.- you have Purugly and Medicham, whoever knows why 0.0, but you need Glameow and Meditite). But, the bad part. It's flippy, and flips are evil.
Modified: 7/10- Would've been higher, but coin flips deduct a point or 2 from this card.
Limited: 8/10- GREAT! You're getting up to 2 basics with 1 card. Considering the majority of the CL cards are basics, this card works really well with the new set.