These two fictional detectives face off in a rap battle of such epic proportions, you'll wonder why a crossover movie hasn't been made yet. Adopting the Christian Bale vocal style of a raspy, smokes-20-a-day Batman, and with an amalgamation of classic Sherlock Holmes and Robert Downey Jr's version, these are two of the best-portrayed fictional characters from the Epic Rap Battle series. While Watson may help Holmes out with his rhymes, it's the highly excitable Robin that steals the limelight with his appearance. Best Line: Batman - "I'll crush your British nuts until they're bangers and mash, I've seen better detective work from Tango and Cash"