Tannin and Slackjaw bring in a captured Cyrus Borg and locks him in a sarcophagus.
Slackjaw stole Dareth's trophies, and later went to the Samurai X Cave to take apart Zane. Afterwards, the Vermillion Army traveled in underground tunnels to their new headquarters.
Slackjaw helped attack the ninja. They also attacked the power source to cause a blackout.
They succeeded in retrieving the Slow-Mo Time Blade, but Jay came to rescue the ninja and his mom and the commanders slowed them down.
Once freed, the ninja used the Time Blade to slow the Vermillion down, and the ninja got away.
The Vermillion arrived at the temple and attacked the ninja. They were able to steal the Slow-Mo Time Blade.
Slackjaw brought Wu to their dome.
Slackjaw was on the lookout for the ninja but didn't realize Jay and Cole passed them. Later, they heard a loud sound and went in to check. They were able to outnumber Jay and Cole but when Lloyd and Zane helped, the Vermillion were defeated.
The Vermillion chased the ninja and regrouped at the dome when they left. Later, when the ninja were granted access to the Iron Doom, Jay talked and blew their cover. The Vermillion were instructed to attack them, but they were ran over by the Samurai VXL. They continued to chase the ninja to the Iron Doom. When Machia told the Vermillion to go to the Iron Doom, they stopped fighting.
- 67. "A Time of Traitors"
- 68. "Scavengers"
- 69. "A Line in the Sand"
- 70. "Lost in Time"
- 71. "Secrets Discovered"
- 72. "Pause and Effect"
- 73. "Out of the Fire and Into the Boiling Sea"
- 74. "Lost in Time"
- LEGO Ninjago: Wu-Cru (non-canon)
- Slackjaw's name bears a very close resemblance to that of Frakjaw. Both are common, low-rank minions in a villainous faction with red as their signature color.
- He is the most common Vermillion figure in the sets.
- Orange variants of Slackjaw appear in the show despite not appearing in the sets.