I'm not smart enough to do everything, but I'm dumb enough to try anything.
~ Beast Boy
Beast Boy is one of the five main heroes of the 2003 animated series Teen Titans and the movies Teen Titans: Trouble in Tokyo and Teen Titans Go! vs. Teen Titans. He is a former member of the Doom Patrol, and one of the five founding members of the Teen Titans.
Beast Boy is the son of two scientists studying wildlife in Africa, Beast Boy was infected as a child with a mysterious disease, the experimental cure for which gave him the ability to turn into any animal, but permanently dyed him green. His parents drowned in a boating accident — Beast Boy being too inexperienced to save anyone but himself — and he was subsequently adopted by the Doom Patrol. It wasn't a stable family, and Beast Boy subsequently ran away after he hit puberty.
Beast Boy is the unofficial comedian of the team, though most of his teammates consider his typical array of jokes and pranks to be pretty groan-worthy, and it's implied that, like his comics counterpart, he's one of the "jokes to hide the pain inside" types. Whether he is or isn't, he is the youngest, in terms of behavior, of the team, obsessed with video games and goofing off, which means he's often chewed out by Robin. A devout vegetarian: as he has been just about every animal under the sun, he finds eating any kind of meat to be too similar to cannibalism for his liking.
Beast Boy is obviously not the most book smart of the Titans, but he can be an effective leader when he gets serious. Likewise, he's very smart when it comes to comic books which is essential when fighting Control Freak. He also has a near encyclopedic knowledge of animals, since he is aware of things like amoeba and knows about less popular dinosaurs (he transforms into several prehistoric animals that most teens wouldn't know even existed).
During Season 5, when the Titans clash with the old enemies of the Doom Patrol, the Brotherhood of Evil, Beast Boy begins to focus a lot more on the mission at hand and displays a new sincere side of himself throughout the season. Some people believe that Beast Boy wears a mask of laughter and happiness to disguise his sadness at what has happened in the past. There are a few instances in the show that he shows his true self. For example, in the episode "The Beast Within", he becomes depressed and saddened when he believes that he has hurt Raven and the other Titans.
Powers and Abilities
Beast Boy has the ability to morph into any animal he knows of. He can change into extinct animals and even animals on different planets. When he changes the changes only take a couple of seconds. It doesn't matter how big or small. He can change from a tick to a T-Rex in seconds. It puts no strain on him to do this. He can stay in an animals form indefinitely. He can take on the shape of animals without limbs as well, such as snakes or worms. Two times he has changed into multiple animals such as a swarm of fireflies and a group of barnacles. When he changes into an animal he gains all of that animals abilities, such as the sonar of a bat, or the strength of a elephant, the speed of a cheetah. Following the reboot, he has gained the ability to take on numerous animals aspects at a time including antenna, a tail, and scales.
Beast Boy has been shown to shape shift into demonic animals when under the influence of Trigon. Beast Boy can also change into a hybrid, a creature that possesses the powers of all animals rolled into one. He can't control this so he doesn't turn into it unless absolutely necessary.
Beast Boy also has the capability to shapeshift into things as small as germs as shown when he acquired this form when he ventured into Cyborg to combat a virus that he caught. He has shown his capability to multiply in this form. Its highly likely he can do the same with swarm creatures such as ants, termites and locusts and behave as one. Quite possibly, Beast boy can use this power on small creatures.