Maxum Man

Maxum Man is a powerful superhero and Eric is his sidekick. He is a little narcissistic and cares very little about his sidekicks as he made his previous sidekick, Golly Gee Kid, do meaningless chores around his mansion. He has mysteriously disappeared and no one, except for Eric and his friend Trevor know that.

Superpowers
Maxum Man comes from a family of superheroes that all seem to wear similar costumes and have similar powers. As such, you can look to Maxum Mom to see his powers since she appears sometimes. Along with that, old videos used for the school show him fighting crime, so some of his powers are seen there as well. He and his family seem to have the typical Superman-like arrangement of powers, namely super strength, super speed, laser vision, etc. however it's unknown what/if his weaknesses are, assuming there are any.

Trivia

 * In App-y Days Maxum Man is shown when Maxum Brain sucked all the junk in Eric's Room.
 * Maxum Man is clearly based on the DC comics superhero, Superman.
 * Maxum Man is very similar to the DC comics superhero, Batman, because they both have kid sidekicks, and they both fight crime.
 * as seen in the end of "the fortress of maximtude" when Mr. Troublemirer threw part of maxum man's cape. the cape glided off the cliff and you see maxum man grab it. indicating that maxum man is not missing but is on vaccation or retired.