dark magic
5a vs. 1a
1a
hot dogs vs. hamburgers
hamburgers
Twilight Sparkle vs. Fluttershy
FlutterShy.
4A vs 2A
if I could do it well, 2a
yoyocase vs. yoyobox
case
ford v. chevy
Honda 
One Drop vs CLYW?
Hmm, I honestly havn’t tried either (don’t buy yoyo’s too often, only at xmax XD).
So I’m going to say CLYW, just because they’re Canadian 
Mario Vs. Luigi
Luigi
John Wayne v. Clint Eastwood
Clint Eastwood
Black Sabbath vs Led Zeppelin
Zeppelin, easy.
M-16 vs. AK-74
M-16
Cofee Vs. Tea Vs. Green Tea (green tea ftw!)
Tea.
Lord of the Rings vs. Star Wars
(Just the movies, LOTR wins in books, obviously)
LOTR!
Green Triangle tricks vs Tower tricks
Green triangle
Hoodies vs. sweaters
Hoodies
Microsoft Vs. Sony
Microsoft for COD online. Sony=everything else.
Dietz vs MMN?
I’ve never tried them but from what I hear I’m guessing Dietz.
Halloween Vs. Texas Chainsaw Masacre
I’ll pick tcsm, even though Halloween is playing in the other room lol.
The Smiths vs the Cure
Oooh, ouch. That’s a tough one. But I’m going to have to say The Cure even though I have both on my iPod ;D
I may be only 13, but I know good music 
Yomega Vs. Duncan