Professor Elvin Gadd (Earth-1344)

"Ooof... I sure take a lot of knocks in this line of work. I'm getting too old for this ghost-catching tomfoolery. Anyway, nice to meet you. I'm Professor E. Gadd."

- Professor E. Gadd

Professor Elvin Gadd, usually referred to Professor E. Gadd or just E. Gadd, is a supporting character throughout the Mario series. He is an incredible inventor and scientist as well as the head of Gadd Science Inc. He speaks in an unrecognizable jumble of words and sounds when he talks to other characters.

Trivia

 * Like Crash Bandicoot's rogue gallery of scientists, his name comes from the archaic exclamation "egad," something that one says in surprise.
 * E. Gadd is the only scientist on the side of good.

Source

 * https://mario.fandom.com/wiki/Professor_Elvin_Gadd