Repsac

Repsac, also referred to as Random Threat by the bugs in the spider web, is a menacing ghost who serves Ms. Grunkle in JumpStart Adventures 4th Grade: Haunted Island.

Appearance
Repsac has three long fingers on each hand with pointed fingernails. His eyes appear to be entirely white with no pupils. He has a large nose and crooked teeth. His skin appears to be blue, but that could be because it's always nighttime on the island. Like most depictions of ghosts, he has no legs or feet.

Repsac also appears to always be grinning. Even when expressing disappointment (be it sarcastic or legitimate), his lips maintain a smile.

JumpStart Adventures 4th Grade: Haunted Island (1996)
Repsac occasionally springs upon the user to ask multiple choice questions that will deplete the user's health if answered incorrectly. Most of his questions seem to involve science and grammar, as well as sentence structure. This is presumably due to the fact that the game does not have activities which specifically address these topics.

If the player uses the map, Respac's appearances are less frequent. He can also stop players while they are stuck in the Labyrinth,

Quotes

 * "I am the keeper of the island, Ms. Grunkle's loyal servant. You must solve my riddle, or risk your health."
 * "Boo! (maniacal laugh)"
 * "You again? I love a good challenge."
 * (If a question is answered correctly) You're right. But I'll stump you; next time."
 * (if a question is answered correctly) Rats. But I'll get you again."
 * (If a question is answered incorrectly) Hmm...too bad.

Trivia

 * Repsac is "Casper" spelled backwards, which is quite fitting considering that Repsac's personality is the complete opposite of Casper's.
 * Repsac led to this version of JumpStart 4th Grade being kept off the shelves as too many children were frightened by his sudden appearances.