why is number 1 bald

Because #5 didn't help #1 when he was captured によって the delightful dorks.And well あなた pretty much get the rest.

I wish I knew the whole story, but from what i understand, Numbuh 5 refused to help Numbuh 1 when he was captured によって the Delightfulls and they used some sort of hair removal device, that would make it bald for good.

The delightful children did it to him.

It's a long story. But it was the Delightful Dorks

mr.boss cut all his hair out it seid in a epesode but didnt 表示する it

In the episode Operation F.O.U.N.T.A.I.N, The K.N.D go to save leeky Leona Number 4 asked why do they have to save her and Number 5 発言しました that the last time that she did not save someone it was bad. So number 4 asked what was it and Number 1 発言しました that the dcfdtl( Delightful children from down the lane) made him bald.

The dcfdtl shaved no.1 and made it so his hair didn't grow back