What do I do with the librarian?

Hint 1 of 11:

Read your manual for a bit of a hint.

Hint 2 of 11:

He's turned sad lately.  Perhaps you should try to help him.

Hint 3 of 11:

You'll need to make the librarian laugh a bit.

Hint 4 of 11:

Slapstick is the easiest way to make him laugh.

Hint 5 of 11:

Do you see anything on the screen that a comic could use?

Hint 6 of 11:

The first of them is the false nose near the bananas.

Hint 7 of 11:

Use it on the librarian to wear it, and you'll see him change a bit.

Hint 8 of 11:

Maybe you should try eating something that you shouldn't be eating.

Hint 9 of 11:

Eat the soap in front of the librarian for your next laugh.

Hint 10 of 11:

Now all you need is a classic gag to finish up the trilogy.

Hint 11 of 11:

Don't slip up on this puzzle, or else you may never finish the game.