The Riddler and Robin vs. Batman

Robin (Grayson) is turned against his mentor. He teams with the Riddler to compose a diabolical scheme. Can they take down the Dark Knight?

0) no prep (but what's Riddler going to do with no prep anyway?)
1) a day of prep
2) a month of prep
3) a year of prep

Robin and Riddler win in all but the first match, and by progressively larger margins. I remember reading an issue of Batman where Robin gets enslaved by Poison Ivy and begins to help her plan crimes. It takes Batman several weeks to catch up to them because he's so good. (Dick, by the way) Just think how tough it would be with Robin AND Nigma.

Batman beats up his sidekick and then beats down Me. Nigma

Originally posted by DARKLORDCAEDUS
Batman beats up his sidekick and then beats down Me. Nigma

Well...maybe if it's one of the other Robins, but Dick could definitely take Bats with Nigma's help.