Ernie runs a wrecking crane for a demolition company in Hillwood. He's knocked down about 500 buildings, and keeps a piece of each one in his room as a souvenir. He has a metal plate in his head. Ernie playing some miniature sort of Sousaphone (either that, or a very oddly-shaped tuba) in a flashback in "The Journal", and he plays an accordion (at Blockapalooza) in the movie, and many other episodes (e.g. "Arnold as Cupid").
He is around 45 years old. He has also shown to like writing poetry, as shown in "Casa Paradiso" and "Ernie in Love". He doesn't have any kids, nor has he ever married. He's often seen with Mr. Hyunh, though the two have been known to argue. Like the rest of the boarders he has an antagonistic relationship with Oskar Kokoshka, being one of the most willing to call him out for his behavior. While usually loud and abrasive, he's shown many times to be rather sensitive.
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