Unknown Male Superhero

This alien superhero was first seen in a flashback in season 4 episode "Caper or Plastic" and is a predecessor to Wordgirl. The flashback took place about 20-30 years ago. Younger versions of the Museum Security Guard, Reginald, Hal Hardbargain, The Masked Bagger, and Mr. and Mrs. Botsford are seen. Later in the grocery store in present time, a janitor is seen in the background who resembles him. This could possibly be his alter ego.

Superpowers
Flying is his only known superpower at the moment.