QuiddichAuror12
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Invader Falls by TexasKingoftheGeeks reviews
Prof. Membrane decides to take Dib to the Mystery Shack to show him "how fake paranormal stuff is." But then Dib meets Dipper and gets more proof than he bargains for.
Crossover - Invader Zim & Gravity Falls - Rated: K+ - English - Adventure - Chapters: 4 - Words: 840 - Reviews: 11 - Favs: 14 - Follows: 16 - Updated: 1/27/2015 - Published: 1/12/2015