Mitch (Phineas and Ferb)

Mitch, also known as "Big Mitch", is a recurring villain from Phineas and Ferb, appearing as the main antagonist in the episodes "The Chronicles of Meap" and "Meapless in Seattle". He is an alien poacher who travels the galaxy, illegally capturing exotic alien species and holding them in his space-ship. His arch-nemesis is a small alien crime-fighter, Meap.

Mitch found a balloon that was originally owned by Dr. Heinz Doofenshmirtz, and added it to his collection, naming it "Colin". Doofenshmirtz found it and they argued over who owned it. Mitch was eventually defeated by Meap, Phineas, Ferb, Isabella, and Candace.

The Chronicles of Meap
Mitch first appeared in the season 2 episode "The Chronicles of Meap", when he captured Phineas, Ferb, Isabella, Candace and Meap in their spaceship, and brings them to his space station, where he show his collection of the alien species he captured. Phineas, Ferb, and Isabella are unaware that Meap is a intergalactic criminal, but Meap is aware of this and warns Candace of it. Eventually, Meap is about to engage into a fight with Mitch after revealing himself to him, but is trapped. Fortunately, Candace manages to free Meap, who then fights Mitch and defeats him. After tying Mitch up, Meap takes his universal mustache translator, explaining to the kids of what really happened. Mitch was then taken away to be given a "time-out".

Meapless in Seattle
Mitch returned in the season 3 episode "Meapless in Seattle", in which he tried to find a lost jar of cutonium so that he could become the most adorable being in the universe and everyone would be so enamored of him that they would obey his every whim.

It was revealed that Mitch is actually in fact the same species as Meap (a species that lives and revolves around cuteness) and is piloting a tall robotic suit that he can control even while not wearing it. After Doofenshmirtz accidentally drank the cutonium, Mitch captured him and took him back to his evil lair where he drained the cuteness out of Doof and put it into himself. Mitch was defeated by Isabella who out-cuted him, and Meap, who blasted him down with his rainbow death-ray after Isabella depowered him. He was then imprisoned for another "time-out".

Parody
One of the first episode's running jokes is that the characters keep mistaking Mitch as Meap's father, to which they both refute. One of Mitch's lines is a parody of Darth Vader's famous line, "I am your father!", in which he says to Meap, "No, I am not your father!".

Another more risque joke has Candace, wielding a baseball-projecting glove in defense of her brothers, saying to the villain "Get away from them, you...Mitch!", a reference to the final battle between Ellen Ripley and the Xenomorph Queen in "Aliens"

Trivia

 * Mitch is apparently known as "Big Mitch" to his friends.
 * He dislikes being called a zookeeper because "that sort of legitimizes" his capture of other creatures.
 * The voice of Mitch is done by English comedy actor David Mitchell. The name Mitch is similar to his voice-actor's last name.
 * He only says the word "meap" without his universal mustache translator. This is also true of his nemesis Meap and the rest of the inhabitants of their home planet.
 * Balloony was the rarest "creature" he has in his spaceship.
 * Mitch is actually the same size as Meap, as he is seen outside of his suit in "Meapless in Seattle". Meap did not previously know that Mitch could step outside his suit. The specific reason for why he wears a suit is unknown.
 * He has his own theme song called "He's Mitch".
 * When Mitch was owning Balloony, he believes that the signature that Doofenshmirtz put on the balloon is nothing more than just a birthmark, something which annoys Doofenshmirtz, who then calls Mitch an idiot for believing such a stupid thing.