Here is what I know, you can build off of it:
Rat: This is found in the woods north of onnet. It is free. You have to navigate a sort of maze to get to a witch at the end who will give it to you
phoenix: This is found on a little cart in York Town, just west of the horse stables. It costs 20000 gralats.
Bat: It is in the second building that you come to in Deadwood (the one that has pinkish details on the outside) on the second floor. It costs 20,000 gralats.
Shadow Pet: It is in the second building that you come to in Deadwood (the one that has pinkish details on the outside) on the second floor. It costs 20,000 gralats.
Pumpkinvine: It is in the second building that you come to in Deadwood (the one that has pinkish details on the outside) on the third floor. It costs 8000