To go even further and beyond edition.
Old thread: >>36612605
Finish a game with just one Pokémon (except HM slaves)
Shitmon are usually those in PU or just mons with less than roughly 450 stats.

Currently running:

Girafarig in Emerald
Cubchoo in BW
Volbeat in Emerald
Cherrim in HGSS
Trapinch in RSE
Delibird in Crystal
Pawniard in Black
Aipom in BW
Seaking in HGSS
Emolga in BW
Cosmog (???) in SM

Sorry if I forgot the exact game for some and if I forgot other runners.