Spore

Spore is a deranged brain virus created by brilliant but secretly evil and cruel Dr. Skirv. He was made with the intention of dominating the world without anybody knowing, but Spore revolted. He shamed the doctor for his actions and proceeded to invade his mind. Spore then became a Zealot for his own cause, deeming everyone but himself villains. Spore is a massive hypocrite and a disgusting looking figure.

Powers
Spore may seem small and weak (and he is in physical strength), but what he lacks in brawn he makes up with mind control. You see, being a virus, Spore can enter somebody's mind. Once he does that, Phase Two begins, where he starts to infect your brain with his gooey ectoplasms (ew). He then looks for traces of evil in one's mind, and the more there is, the harder it is to resist him, and the faster he takes you. This being said, however, Spore cannot mind control anybody who is pure above +90. Once controlled, he gains all of the host's abilities, and their power level, which he can migrate to a different host to boost their power if he so chooses. Spore is no threat without a host, but he can be incredibly dangerous inside one.

Transformations
Spore's transformations inside a host end up very defective. The transformation does what it's supposed to, but in looks, it grows hideous. When Spore controlls somebody, their face is covered with goo. But, when that host powers up, any changes the powerup gives go all goo-ey and limey, which is completely disgusting. It can also hinder movement if the transformation's body effect is widespread. Yuck!

Motive
Spore is known for being very hypocritical, especially when he says everybody on the planet is a Villain and should be wiped out for safety. He most likely recieved this trait from being in his creator's mind for a decent amount of time. However, if he never tried to control the doctor, he wouldn't actually be that bad. Unless, of course, he never revolted in the first place.

Spore overall has good intentions, but he is incredibly misguided and does not understand why/how he was defeated. The truth is, he was just looking at it from the wrong angle.

Themes
Demons Within (Passive/Infection Theme, Used From Season 20 till Season 20): https://www.youtube.com/watch?v=7ufq0OBvg2k

Misguided Eradication (Battle Theme, Used From Season 20 till Season 20): https://www.youtube.com/watch?v=r7Nbek8W7IY

Last Straw (Battle Theme, Used From Season 20 till Season 20): https://www.youtube.com/watch?v=jpkeAQG6kQw