Pets only have a lifespam of 90 days and after 90 days your pet will automatically turn back into a doll.To have a pet again you do not need to buy another pet.Just go to cash shop and buy the water of life which costs 4,500 @cash and use the following method to revive it
Revival via Marr the Fairy @ Ellinia
Find Marr the Fairy at Marr's Forest.
Marr's forest is a hidden area in Ellinia town. Go to the purple glowing flower at the bottom right of the town to enter Marr's Forest. She is the only NPC in this map. Talk to her and she will ask you to bring back the Water of life and the
Life scroll in order to revive the pet. The Water of Life can be brought at the Cash Shop for 4,500 Acash, while the Life scroll is obtainable by correctly answering a few questions from
Bartos the instructor at Pet's Walking Road in Henesys.
To find Bartos, go to Henesys park where
Cloy is and enter from the "Pet Park" sign to reach Pet's Walking Road. Bartos is at the extreme left. The questions are mostly random, but can be re-attempted if you answered them wrongly. After obtaining both items, bring back to
Mar the Fairy who will then revive your pet.
Q&A Session
Q1: Which town is Doofus from? Henesys
Q2: Choose the person that has nothing to do with pets. Maya
Q3: Choose the one (description about pet) that is just plain wrong! Pets can attack the monster with its master.
Q4: What level do pets start using human phrases? Level 10
Q5: How much fullness does it (pet food) raise? 30
Revival via Wisp @ Ludibrium
Speak to Wisp at the right portal of Eos Tower Entrance. She will ask you to bring back the Water of life and the Life scroll in order to revive the pet. The Water of Life can be brought at the Cash Shop for 4,500 Acash, while the Life scroll is obtainable from the "Document Roll" in Chloe's House in Ludibrium Village (the house in the middle of the street).
After obtaining both items, bring back to Wisp who will then revive your pet.