If you are referring to the Krawk petpet, you can restock it from the Tyrannian petpet shop, buy it from other users on the auctions or trading post. But they are very expensive... Sold for over 3 mil nps.
If you are referring to the Krawk pet, you can change your existing pet into a Krawk by:
- morphing the pet using a Krawk morphing potion. Eg: Blue Krawk Morphing Potion (very expensive!) Krawk Transmogrification Potion which turns your pet into a Mutant Krawk also works.
- letting your existing pet play with a Magical Krawk Plushie. (also very expensive!) Once the pet has played with the magical krawk plushie, it will turn into a normal krawk plushie and your pet's specie will turn into a Krawk. Colors depending on what color the magical krawk plushie was. Eg: Letting your pet play will a Magical Green Krawk Plushie will turn it into a Green Krawk.
If you have a Krawk petpet, you can also transform it into a real Krawk pet. Just follow these steps:
1. Making sure you have less than 4 pets, buy a Krawk petpet and attach it to one of your existing neopets. Check for an available name and name the petpet this name. THIS WILL BE THE NAME OF YOUR KRAWK PET!
2. Now, go visit the Fungus Caves, located Here: http://www.neopets.com/pirates/funguscave.phtml
3. Feed your Krawk petpet some fungus and viola! You now have a Krawk Pet!