How do I overthrow Bojon (solution #1)

Hint 1 of 9:

Visit him first.

Hint 2 of 9:

He doesn't like visitors, does he?

Hint 3 of 9:

Maybe you can frustrate him enough to tell you something.

Hint 4 of 9:

Maybe he will even tell you the source of his power.

Hint 5 of 9:

Try this:

Hint 6 of 9:

1) We're plumbers.

Hint 7 of 9:

3) We know what's going on.

Hint 8 of 9:

2) We'll be back.