Archie's Weird Mysteries (1999)

S01E19 Something Is Haunting Riverdale High

Midge, Dilton, and Ethel are not the most well-liked kids in school, so their disappearance goes largely unnoticed. But when Archie accidentally becomes invisible and intangible due to one of Dilton's contraptions, he realizes he needs their help to prevent the malfunctioning device from transforming Riverdale into a deserted ghost town. Can Archie discover the strengths of the classmates he often overlooks and assist them in deactivating the machine, especially when they struggle to even lift a pile of papers?