Note: Due to all ghost warriors being identical in appearance, it is impossible to determine who is who in the television series. As such, any appearances of a ghost warrior will be cataloged here, regardless if they are in fact Cowler.
When Morro used the Realm Crystal to open a portal, Cowler was able to return to Ninjago. He and the other ghosts swarmed the town of Stiix to prepare for the arrival of the Preeminent. He like the other ghosts were incredibly hungry and stole all of the food intended for the imprisoned citizens.
When Wu and Misako arrived in a noodle truck, Cowler and a ghost ninja searched the truck but found it to be empty.
After the Preeminent emerged in Stiix, Cowler and the other ghosts used materials from the town to create a massive mobile suit of armor for their queen that they helped operate to enable her pursuit of the fleeing citizens. However, he, his master, and the other ghosts were defeated and sent to the Departed Realm by a tidal wave unleashed by Nya.
Cowler is a ghost who is just as interested in scaring his foes as defeating them. His favorite trick is to imitate the voice of someone's best friend to lure them into a trap. Sometimes, he even imitates Morro's voice to play tricks on the other ghosts. Or he did, until Wrayth had a long "talk" with him ...[link unavailable]
- 70733 Blaster Bike
- 70736 Attack of the Morro Dragon
- 5004817 Ninjago Collection
- 30294 The Cowler Dragon