Is Arnold supposed to be deformed???

I don't think he's supposed to be deformed. Like you said it's a cartoon trait to make him stand out like the other characters' physical traits.

I think Helgas' unibrow is really suppose to be a unibrow. Today, thick eyebrows are coming back.

[deleted]

It's a weird family trait. Arnold's mother and his cousin Arnie also had that head shape.

Honestly i think that's the whole joke that he has a football head nor that hes not deformed

Honestly i think that's the whole joke that he has a football head not that it means hes deformed