Bizarro , Magneto , Modok , Fin Fang Foom , Mastermind , Violator , Despero , Omega Red , Dark Phoenix , Loki , Ra's Al Ghul , Darkseid , Galactus , Doctor Doom , Joker , et. al.
X men
Poison Ivy
Some of the Marvel villains are Abomination, Dr. Octopus, Loki, and Dr. Doom.
A few of the DC and Marvel villains are, Dr. Doom, DreamSlayer, Sabretooth, Lord Havoc, and Magneto.
A Dinosaur with turbolasers for arms. His backstory is that his parents were killed by big game hunters and he is out for blood.
superheroes friendly,brave saving,caring,punching,kicking superheroes are brave and cool
There is no standard collective noun for a group of villains. The collective nouns for thieves can be used, for example a den of villains or a gang of villains. Or, since collective nouns are an informal part of language, any noun that suits the context or suits your fancy can function as a collective noun; for example, a collusion of villains or a connivance of villains.
Yes, several. The most prominent two I can think of are Marvel's She-Hulk and DC's Jade (daughter of Alan Scott, the golden-age Green Lantern).
superheroes
The cartoon you are referring to is likely "Teen Titans," in which a group of teenage superheroes can transform into robots during battle. They use their unique powers and abilities to protect their city from various villains and threats.
You can find a comprehensive list of superheroes and villains on websites like Marvel or DC Comics, which feature profiles, histories, and powers of various characters. Additionally, comic book databases like Comic Vine or IMDb have extensive catalogs of comic book characters.
One opinion believes that yea, superheroes can be misleading because they fight villains without even trying to reason with them in the even that they're good-hearted villains but another opinion believes that heroes fight to defend people as well as their planet and feel that there's no need to waste time in trying to reason with people and beings that will be causing trouble.