The guy had been doing the event for several years and stated he wasn't making money, but losing a bit. He did it because he loved Pokémon and wanted to share that with other likeminded individuals.
If there was a problem with what he was doing, there is a thing called a "Cease & desist order." I'm sure he would have complied. I also don't believe that he was serving drinks to just anyone. Some little kids weren't in there buying alcohol. The Pokémon Company got pissy because his ad for the event featured two Pokémon on it. They should have politely asked him first, then followed up with a cease & desist order. Suing the guy is ridiculous and getting mad because he went public with what amounts to extortion and then trying to screw him over harder is ridiculous.
Sony and Microsoft are more than happy to embrace the public and don't say squat about events like this. It's free advertising for them. But I guess that's why PS4 and Xbox One are outselling the Wii U like it (Wii U) hasn't even launched yet. But that's what happens when you $hit on your fans, deny them localizations of games they actually want and shortchange everyone in the US on Amiibo's. Because y'know...for five straight series of figures, you still haven't figured out that they sell like hotcakes and you refuse to mass produce the older figures that nobody was able to get!