This story is a sequel to MLP G5: Groger

Horseshoes is becoming more impatient about her recruitment into the Knights when a foreign pony enters the city. His name Is Zebediah J. Snake Oil, and he is offering a Cure All potion that will solve every probem easily for everyone who drinks it. As Razzle Dazzle and others become more concerned with Horseshoes' addiction to 'the stuff', it soon becomes apparent that Snake Oil has an ulterior motive behind his miracle cure.....