Snake King was approached by Commander ApeTrully, who hoped that he would join Big Green. However, Snake King was uninterested and turned the commander into an egg, then returned to the inside of his box.
Snake King later stayed fairly inactive as First Squad fought to save their commander, but did emerge when he heard Mystique Sonia's flute playing. This prompted him to join Big Green. He subsequently joined Big Green and became its DJ.
His lithe body can squeeze inside a box and, coiled into a spring, he can pop out like a jack-in-the-box. He can use hypnosis to put anyone into a trance, and was even known to disguise himself with masks to prompt foes to look into his eyes. Once his victims are in this state, he can turn them into eggs.
Snake King's flexible, coiling body has many uses. For example, by coiling his body into a spring, he can launch objects and other people and animals great distances, as he did to the Zebra Brothers. He has also been known make music by curling his body into something of a spinning disk, which makes music when his teeth scrape on it, much like a needle on a record player. It was with this ability that he became Big Green's DJ.
Snake King proved to be tricky, and used his great patience to let his enemies come to him. There is some indication that he is a strategic thinker, as he seems to have masks specifically intended to trick certain enemies, such as the HighRoller mask with which he fooled the Zebra brothers.
- Snake King is based on the cobra.
- Snake King being pacified by Sonia's flute is a reference to snake charming.
- He is only known animal to play music with his body without using a instrument, and the first to become a DJ in Big Green.
- He is classified as Hero 034.
- This corresponds to the thirty-fourth ranked Star of Destiny in the novel Water Margin, Xie Zhen, whose nickname is "Double-headed Serpent".