It's quite some time ago, so I can't tell you exactly how long it would take us to finish a game. What I can tell you is that we didn't think any game was particularly difficult. Sure, team Nintendo in Super Soccer was a bitch, Mike Tyson in Punch Out was a tough cookie, M. Bison (Vega) in SFIIT could dish out a beating, Revenge of the Shinobi, Strider and Comix Zone all had their frustrating moments, but I can't say any of those were exceptionally difficult.
I am the first guy to ever say DS controls are terrible?
Yeah, okay