I just had a couple a matches in the MTA simple tournament, they can get pretty intense as well. I had one set with a Peach that lasted about 20 minutes, I was getting my ass handed to me for quite a bit until I changed my approach and backed further from the net. I started to make a comeback and tie things up and then we went on to have a neat back and forth that lasted about 10 minutes because everytime one of us got the advantage, the other would get a deuce and reset it back to neutral. It was a really good set
Yeah... looks like Bowser Jr. needs to get nerfed. For now the best thing to do is force him to use his energy and then hit him with a special or Zone shot. Or perhaps its best to just go for a K.O against him? I haven't encountered one yet, so i'm not too sure how to handle him.