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He was one of the two Sons of Garmadon members who guarded the captured Cole, only for him to be tricked and knocked out by Cole during his escape.
Chopper Maroon was watching the captive Ninja as baby Wu jump on his back for enjoyment. Later, Ultra Violet left him in charge to watch after the Ninja, only for him to be tricked by Cole again, while baby Wu frees the Ninja and they knock him out. Later, he escaped with all of the Sons of Garmadon and captive Lloyd in tow on the Destiny's Bounty.
Chopper Maroon, along with Mohawk, was tasked with patrolling the grounds of the Royal Palace, which was reconstructed into the Temple of Resurrection. After their patrol, they guarded the entrance to the temple until they were knocked out by the Ninja while they were distracted by Harumi performing the ritual to resurrect Lord Garmadon. They were both arrested by the Ninjago police force and sent to Kryptarium Prison for their crimes.