Blocky

Blocky is a character and the only non-user to be a Sysop, technically.

He is in Max2's "emotion processor", which is, as told by Max, "A little thing inside my head that controls my emotions."

He can still exist as a separate character, but only if it is needed. When he leaves Max's body, Max becomes void of all emotions. Blocky also grows to a more reasonable size.

His color changes based off of his, and therefore Max's, mood.
 * Red - Normal (Not displaying a severe emotion)
 * Blue - Sad
 * Orange/Red* - Mad
 * Green - Calm
 * White - ???

Trivia
He is likely the smallest character, at only 12 pixels tall, in his biggest form.