As a villain in season 1
Lloyd appeared in Jamanakai Village, throwing toy snakes at the residents and demanding their candy. When the Ninja arrived, they were surprised to see a boy instead of the fearsome Lord Garmadon, prompting Lloyd to explain that he was the dark lord's son. He threatened to unleash the Serpentine on the Ninja if they didn't surrender, but the unimpressed heroes hung him on a sign, where the irate villagers pelted him with fruit for his trickery.
Eventually, Lloyd escaped, swearing revenge on the Ninja. He ended up wandering into the icy Glacier Barrens, where he stumbled upon a strange tomb. Curious, Lloyd opened the tomb and fell inside, where he met the Hypnobrai, a tribe of real Serpentine. The Hypnobrai General, Slithraa, attempted to hypnotize Lloyd, but the would-be evil overlord slipped on the icy floor, causing Slithraa to stare at his own reflection in the ice. Thus hypnotized by his own attack, Slithraa accepted Lloyd as his master, and Lloyd immediately ordered the Hypnobrai to Jamanakai Village to take his revenge.
With the Serpentine at his side, Lloyd quickly subjugated the village, stealing all of its candy for himself as the Hypnobrai mesmerized the villagers. When the Ninja returned, Lloyd watched the battle until the Ninja managed to steal Slithraa's staff, prompting him to call a retreat
- In Season 5 of Ninjago, he is going to get possessed by ghosts which makes him the second character in the series to be possessed by another villain (the first being his father being possessed by The Overlord).