Mystery Island/Island Paint Brush turns your pet into an islander like the people of Mystery Island.
Pricing and how to get one
The current price of a Mystery Island Paint Brush is around 1,750,000 Neopoints. [As of June 2013]
You can buy a Mystery Island Paint Brush from the Trading Post or Auctions. Since the Paint Brush is over 99,999 Neopoints, you will not be able to find one on the Shop Wizard.
It is possible to win this paint brush from the Fruit Machine; the only other way to obtain one firsthand is from a random event in which Jacko will hand it to you.