Ernie is a space-crab who is a scientist and making formulas. He is one of the members of Underfist. He was a red crab with a TNT in his mouth like a cigarete. Fred Fredburger made a drawing of Ernie which shows he is blue and purple, instead.
Overview[]
It looks like Ernie was going to be part of the Underfist if he actually came in the series.