King Jellyjam makes several cameos throughout the Give Yourself Goosebumps series.

King Jellyjam took notice of Wendy and realized what had happened he was about to grab Wendy, but ended up suffocating in his own foul smell before he could do any harm to her. He then tried to wash himself, only to have the same result. The kids did so, outraging King Jellyjam and he was about to eat Alicia but was unable to pick her up, because of his hands being too fat and clumsy to pick up her or any of the other kids off the floor. And the next morning, she returned with her brother, Elliot (whom she stopped winning a race) and yelled at the kids washing King Jellyjam to stop and lay flat on the floor. Then, one night, a girl named Wendy snuck in and found out what was really going on, unbeknownst to King Jellyjam. A little girl named Alicia realized what was happening and tried to warn everyone else at the camp, but the counselors caught her and she was forced to wash the evil purple blob too. And if anyone stopped cleaning him, even for a brief moment, King Jellyjam would gobble them up then and there at least three kids sadly fell victim to that. Because of this, King Jellyjam had them scrub him and hose him day-in and day-out. Unfortunately for the campers who won the sports and earned the Camp Jellyjam coins they won for each sport, King Jellyjam seemed to get dirty, sweaty, and smelly just as quickly as anyone can clean him. Instead, he hypnotized the counselors, including one named Buddy to bring forth the strongest, most physically fit of campers to do the dirty work for him by testing them out by winning six sports in a row that each of them competed in. Since King Jellyjam's fingers were too fat and clumsy to pick up anything lying on the floor of his cavern, he was unable to clean himself. He often let out humongous burps that shook the ground with its tremendous force. Additionally, he had a foul stench and would sweat black snails through his pores. King Jellyjam had the power to control minds. While not discussed in the original book, a bonus feature at the end of the Classic Goosebumps reprint says that King Jellyjam was accidentally created when a camper left a cup of gelatin in a cave contaminated with radiation and filled with snails.

Goosebumps camp jellyjam