Mewtwo 

"Genetic Pokemon" with strong psychic powers. It was created by a scientist after years of horrific gene splicing and DNA engineering experiments.

Hooray! I just used my Master Ball and caught Mewtwo.

Mewtwo by Eyeballflyball July 8, 2003

Mewtwo 

Probably the only Pokemon that's actually cool. The only Pokemon who seeks world domination and plots for him and his clones to inherit the world. He is the most powerful of all Pokemon and can withstand anything that comes his way.

Mewtwo: Behold my powers. I am the strongest Pokemon in the world!

Mewtwo by Woobie June 1, 2005

Mewtwo 

Power manifested in a creature so vile, it makes you tremble to think how humans, through DNA splicing and engineering, were able to create such a monstrosity. Mewtwo is more than a pokemon, it's an example of the kind of power us humans would like to possess; that's why everyone connects with it and makes him the victor against any other creature. There's Deoxys, Lugia, Ho-oh, Groudon and Kyogre, there's Palkia, Dialga and even Darkrai but nothing really compares to the power and willingness to cause harm that Mewtwo possesses. It would be interesting though to face off Mewtwo against Arceus and witness Mewtwo obliterate Arceus from the inside out with the power of his mind done with but a single blink of his eyes!

Mewtwo concludes, "I wasn't born a Pokémon, I was created; and my creators have used and betrayed me! So, I stand alone!" Then goes on to destroy the entire facility along with everyone in it!

Mewtwo by Fiendermander January 15, 2008

mewtwo 

The only cool Pokemon anymore. In the first Pokemon movie he goes around killing people. That is so badass.
Mewtwo uses the power of his mind to cause havoc. Isn't that just plain cool?!?

"He even speaks english, not his damn name over and over again! lol "
-me

mewtwo by Dave March 21, 2004

MewTwo 

Mewtwo is a Pokémon created by science. It is a bipedal, humanoid creature with some feline features. It is primarily gray with a long, purple tail. On top of its head are two short, blunt horns, and it has purple eyes. A tube extends from the back of its skull to the top of its spine, bypassing its neck. It has a defined chest and shoulders, which resemble a breastplate. The three digits on each hand and foot have spherical tips. Its tail is thick at the base, but thins before ending in a small bulb.

MewTwo is a pokemon created by Science, DNA from Mew

MewTwo by LuminoPhoenix November 21, 2016

Mewtwo 

The most awesome Pokemon ever. Originating from the cells of Mew, he was cloned, but when activated he quickly learneed his supposed purpose, grew angry, and destroyed the laboratory, killing many people. In essence, he is the only Pokemon cool enough to kill you, your friends, your family, and still be able to mix a refreshing drink out of your blood, and intestines.

Aw f***, it's Mewtwo! Everybody run!

Mewtwo by The Noid December 28, 2007

Mewtwo 

Just owns, pure owns

It is totally unstoppable, usually goes on killing sprees.
It tries to kill pikachu in a movie, but fails

It hides in a cave near Cerulean City and kills anyone who enters, unless you have a master ball.

The master ball is your only means of survival against this monster

Person 1: "Holy Shit man, i bumped into mewtwo yesterday"

Person 2: "How did u survive? Come you weren't killed like everyone else?"

Person 1: "I had a master ball!"

Mewtwo by Example555 January 30, 2009