Schulz vs Botha set the record in germany for the biggest numbers in television. Klitschko vs Chagaev and Klitschko vs Haye may have made the most money at live gate. The biggest crowd in germany attended at the fight between Max Schmeling and Adolf Heuser (70,000 at the Neckarstadion in Stuttgart)
Mexico its not even close Chavez vs Haugen Japan it was probably Koki Kameda vs Naito England probably Hatton vs Tszyu Germany is probably Wlad vs Haye
Don't know about viewers. It has been said however that Mayweather Hatton did north of 1million PPV buys (UK only) & I am almost certain that Froch Groves did more than that (not to mention the 80K people who went to watch it live)
I would suspect that got the most TV viewers but not a huge gross. The venue, the Saitama Super Arena, has a capacity around 36,500, whilst the Tokyo Dome (Tyson Vs Douglas) is 55,000 seats.
that was on free TV, so whilst more people watched it they probably didn't make the big money that froch groves II did.