How do you get a voodoo coloured pet on marapets

Well, there are multiple options:

- If you have enough money, you can buy a potion from the auctions or from someone's shop
- You can use the portal or the whirlpool, but it will take a while and there's not that high of a chance.
-You can put your pet in the Temple of Transubstantiation and go through all 30 levels.
-Or, you can trade pets with someone who already has a Voodoo pet.

Hope this helps :)