As usual I don't own any character you see here.
We see a crowd of characters from cartoons, movies, tv shows, video games and comic books are looking at the stage. Then Blaster transformed into robot mode. "Hey what's happening!? This master Blaster coming at you. With another epic rap battle of fandoms." said Blaster.
The crowd cheers and Blaster decided to introduce the rappers. "Our first rapper is from the park, a slacker, and gamer. But he's no flyer, Mordecai!" said Blaster.
Mordecai walks out on the stage doing his trademark whoa! "Mordo in the house!" Mordecai shouted.
"And his challenger from Springfield, he's America's bad boy, this century's Dennis the Menace, Bart Simpson!" said Blaster.
Bart Simpson rolled on the stage on his skateboard. "I'm Bart Simpson! Who the hell are you?" said Bart.
"Mordecai you won the coin toss back stage so you go first." said Blaster, he transformed into boombox mode and play the rap music.
(Mordecai)
What up! What Up! The name is Mordecai, people call me Mordo. I'm way more badass then Bilbo and Frodo.
Rigby and I go on awesome adventures, because we're best friends. Milhouse is just a sidekick who takes the blame. He's as lame as Jack Spicer, Milhouse is beyond the loser scale!
You say these stupid catch phrases in the past, but people phase it out. Your show is really old and running out of jokes. Once your show becomes dead, no human will poke it with a stick.
You caused the Angry Video Game Nerd to eat his own shorts. You're just a rip off of Dennis the Menace who carries a slingshot in his pocket. You hogged all the Simpsons games for yourself. But you're just the underdog in this battle.
Do yourself a solid and go back to funny school, and be the class fool. Because your show is almost as boring as King of the hill.
(Bart Simpson)
You should go back to school, because you can call me the professor. Dr. Bartman will take you to comedy 101. How did you come up with Regular show, it's a big fat lie like Homer's ass. You're like that Blu guy from Rio, chickens out to ask a girl and doesn't know how to fly.
I'm a better prankster than Muscle Man, and Gloyd Orangeboar, they bow down to the king of pranks and kiss my butt. I don't think Milhouse as a sidekick, Rigby gets easily tricked into anything but he dropped out of high school. You should tell Benson to cool down before he explodes like belt after Thanksgiving.
I crank called your boss and he blew a fuse and I wonder how Pops is able to stand with fat head. He's a bigger wussy than Martian Prince, Rod and Todd Flanders put together. You think you can be with best of Cartoon Network, but you'll crash and burn with the rest.
Put you didn't count on one thing. You stink like my butt! Time to wrap this up, so eat my shorts and don't have a cow man!
The crowd cheered after Bart was done, than Blaster transformed into robot mode. "So who do you think won this battle? You decided. You can also suggest some future battles." said Blaster.
Who won?
You decide.
You can also suggest who should be in the next battle or future battles.