The Bullfrog [Supervillain]

The Bullfrog was once a man by the name of Pagini - the greatest opera singer in the world, until he let his alcoholism get the better of him. When given the chance to make a comeback, he got drunk again and ruined the opera with a dismal performance. The owner of the opera called him a bullfrog and threw him out.

Angry and blinded by hubris, Pagini decided to get his **** by putting on a Bullfrog opera costume (one that gave him enhanced strength & agility) and dedicate the rest of his life to evil as THE BULLFROG!

Although a Golden Age villain, The Bullfrog is still active in the modern day.