The Subspace Emissary's Worlds Conquest

The Subspace Emissary's Worlds Conquest is a Super Smash Brothers fan-fic that is absurdly long and entertaining. It stars the OC Chris and Lucario, who embarks on a quest to stop the Subspace Emissary from taking over all the worlds.

Tropes found in this work:

 * Doorstopper: As of January 2012, the story has 3,357,528 words and 191 chapters. It's one of the longest fan-fics on Fanfiction.net and definitely the longest Super Smash Brothers fic. That's roughly 17578 words per chapter.
 * Dropped a Bridge On Him: The Melee characters and the in-game Lucario are killed off-screen.
 * Defrosting Ice Queen: The Werewolf world arc, for Wolf.
 * Filler Arc: The Smash Mansion chapters between Worlds.
 * Job System: Chris' Special Ability.
 * Lonely Rich Kid: How it opens, and we almost never see Chris' parents.
 * Massive Multiplayer Crossover: The characters have gone so many places, even out of Nintendo. Megaman and Final Fantasy Seven are noticeable ones, but there have also been references to Persona 4 and many, many other games.
 * New Powers As the Plot Demands: Chris and Lucario get different powers depending on which world they're in.
 * Sequel Displacement: Much longer and better known than the Pokemon fanfiction both the primary main characters originally come from.
 * OC: Chris, one of the main characters.
 * The Stoic: Wolf, complete with a Defrosting the Ice King chapter.