Sabrina, the Teenage Writer

Plot:

Sabrina receives a C on her English story and Zelda suggests she use a manual typewriter to help her out. The typewriter turns out to be magic and the characters from Sabrina's spy-story come to life and they're all clones of Harvey, Libby, Mr Kraft, Mrs Quick and Valerie. Hilda & Zelda receive Other Realm chain-letters and are bombarded with strange enchantments.