Over The Hills And Far Away 
The Sonic fan named Ian the Potto set himself a challenge: think of the most 
impossible, most outlandish Sonic crossover possible (that Archie Comic hasn't 
used yet), write it up in a fanfic and make it WORK! On the whole I think he's 
succeeded admirably. If you can't guess what the crossover element is from the 
title, I won't spoil the surprise. Much as I'd like to.