[Fiend Folio] How to unlock BONUS characters! (TUTORIAL) 

Hoo boy. Get ready to read. Slippy's Birthright: "Pungent odor" It, and I quote, "makes her spawn lingering poison gas clouds when using Golden Frog Head's farts. Her sprite also changes to resemble Golden Frog Head." - Fiend Folio Wiki (also, Slippy's a female? I honestly couldn't tell.) China's Birthright: "Super glue" Gives her the pocket active, "Horse Paste" (8 charge) Horse Paste removes 1 broken heart on use. *Car Battery* boosts this, increasing the amount removed to 2. Peat's Birthright: "Holy crap, Lois!" Not documented. Keep in mind, I'm getting all of this from the wiki. Fient's Birthright: "Reefer madness" Not documented. Fend's Birthright: "Libido up!" Not documented. MAY have something to do with charming. I'm just guessing here, though.