What is the correct way to use 全部: Adverbially or Attributively?

Question

Which of the following two versions is correct? Or are both of them incorrect?

The one who ate all nuts was Squirrel.

木の実を全部に食べたのりすです。

全部な木の実を食べたのりすです。

Answer 1

Both, kind of. It's an adverbial noun (noun that can behave like an adverb), so you can treat it like you would any other number + counter.

So your first sentence is almost correct (skip the に):

木の実を全部食べたのはりすです。

Alternatively, you can use の instead to use it attributively (but not な):

全部の木の実を食べたのはりすです。