The Joker-Round 1: I do kind of like the batty man line, it's a nice little pun. The song references could be a lot better. For example, there isn't really any joke made about "Fat", he just calls him fat and then moves on. 7/10
Weird Al Yankovic-Round 1: There really aren't any references whatsoever in this verse, it's pretty much just filler. I guess the tropical, mafia, and straightjacket line is a reference to the way he dresses, and that line is decent, but the rest of it is just average. 5/10
The Joker-Round 2: There are only two reference in this verse, and neither are that clever. The "why so serious" line is really just thrown in there, and there's no real joke about it whatsoever, and the same could be said for the "everything you know" line. 4/10
Weird Al Yankovic-Round 2: The Barbara and Harley lines are at least references, and they're not bad lines, so this verse isn't so bad. The glass cup line doesn't rhyme with anything, but I won't take off too much for that. 6.5/10
Pinkamena-Round 3: I was hoping the Winnie the Pooh joke was just a reference I wasn't getting, but I googled it and as far as the internet knows, Winnie the Pooh has nothing to do with Pinkamena, so that line just seems too random. I sort of like the "not always so sweet" line, but the rest of the verse doesn't really have any great disses or boasts. 5.5/10
Overall: It's not quite as good as the Pac-Man vs. Mario battle. There are once again a lot of filler lines and some pretty random references. Try to let no filler lines in your battles, and remember to try to make every single line something you're proud of. Preferably reference something in each line. 5.5/10
The Joker's Best Line: Oh look, another batty man to add to my collection
The Joker's Worst Line: (I think everything you know is wrong!) But this isn’t the time to start singing that song.
Weird Al Yankovic's Best Line: (You only seem to be in three different looks,) Tropical, mafia, and straightjacket, you mook!
Weird Al Yankovic's Worst Line: I mean every single time you appear, you smell and look like an ass!
Pinkamena's Best Line: I’m not always sweet, now I’ll make a new batch
Pinkamena's Worst Line: Cupcakes so sweet, and I'm also expired
Final Results:
The Joker: 11/20
Weird Al Yankovic: 11.5/20
Pinkamena: 5.5/20 (equivalent to 11/20)
Total Score: 33.5/60 (equivalent to 28/50)