Forthcoming Disney CGI flick Wreck-It Ralph looks like it's going to be a laugh-riot, largely because it features an absolutely obscene number of video game cameos from the likes of Street Fighter, Q*Bert and Pac-Man. A heart-warming tale of a video game villain who yearns to become a good guy, the movie features the vocal talents of John C. Reilly and Sarah Silverman — as well as some contributions from Nintendo and Sega bad guys Bowser and Doctor Robotnik/Eggman, from Super Mario Bros. and Sonic the Hedgehog respectively.

Speaking to IGN, director Rich Moore and producer Clark Spencer spilled the beans on what it's like to make a film with so many famous video game properties. While production was smooth for the most part, the creative duo reveal that they hit a minor snag when it came to Nintendo and Sega's desires for their own characters.

Moore: "We did have kind of a check-in process, where we would show them the footage and say, 'What do you think? Is it good?' At one point, [Nintendo] said, 'Bowser's much bigger than that. He's way bigger than Zangief.' We were like, 'Okay, we'll make him bigger. How's that?' They'd say, 'Yes, that’s good — but he wouldn’t drink his coffee like that. He wouldn’t make that mouth.' [Laughs] Of course, then people from Sega said, 'Well, Doctor Robotnik is bigger.' [Laughs] They wanted their characters bigger and bigger. We were going to end up with these giants in a room, with Ralph as this little guy..."

Moore went on to add that the process actually had a positive outcome, with the resultant character models looking incredibly close to their official counterparts. Still, it gives a fascinating insight into how maddening it must be to work with companies as pedantic and protective as Sega and Nintendo.