The Legion of Weasel Doom From Plan Escape, the Legion of Weasel Doom was led by Kefira's familiar, Amund, a weasel with machinations for planar domination. He was the Lex Luthor to the Legion, except with much more hair. He was often caught with maps of Poland, and snuck off at night to meet with the Legion in Sigil. This culimated one night when Kefira awoke to find a small Hall of Doom hovering out her window, and chased it, jumping on and being flown across the city, naked, clinging to the flying structure.
The Fireproof Fern From Hunter: Charlie Team, The Fireproof Fern started as a completely one-off joke. Modi walked into a burnt-down bar, and wanted to know what happened, idly wishing aloud that he'd had a fern or something to willow-whisper to. We joked back that it would have to be fireproof, and then Luna did an impression of the fern talking to Modi, speaking in a high-pitched, silly voice, throwing, "Yay!" at the beginning and end of every sentence. Everyone loves The Fireproof Fern. And she loves you too.
Sixpack Crapper A D&D miniatures game mini, Sixpack Crapper is a demon of some sort (this will be updated with the name of the mini once Luna finds it out), who is incredibly muscular and well-sculpted, with a rather potent set of abs. He's also in a sort-of squatting position. One can extrapolate from there, but that's pretty much the entire joke. Problem was, we (and by we, I mean everyone but Ken) couldn't stop giggling about it for like 20 minutes. We loved Sixpack Crapper, especially once we came up with his name. He's the best mini ever.
Miniature Meowing Sewer Llama From Broken Souls: This Is Spinal Tap, really, it's just the result of Phawks and Luna being retarded. We were making jokes about the wildlife of the sewers under Corvis, and, well, somehow the Miniature Meowing Sewer Llama evolved. It's exactly what it sounds like. It's a little llama about the size of a medium-sized dog, that lives in the sewers, and meows.
Downsyndrigo From Diablo II: Drawing Aggro For Dummies, during a dungeon crawl, we encountered a wendigo just standing around guarding a chest. We hadn't gotten close enough to draw his attention, yet. Without even a warning, we all suddenly charged him and killed him in a single round, with some pretty ludicrous rolls. We started joking that the wendigo was just standing there, waiting to give the chest to somebody. The mini we used was the D&D miniatures game Grey Render, who's got an arm up almost like he's motioning, "over here!" So one goofy voice going, "Hey guys! I have a chest, you want it?" later, he became super sympathetic. However, thanks to the voice we gave him, we also decided he was kind of downsy, if sweet, and thus he became the Downsyndrigo.