Pit Fiend -> Pot Fiend, it's a devil in the kitchen. Its soups and stews are damnably good.
Pit Fiend -> Pip Fiend, a devil about grammar.
Pit Fiend -> Pin Fiend, kills you in place. Likes to wrestle and preserve butterflies and humans.
Pit Fiend -> Spit Fiend, has ALL the explosive goober breath weapons.
Pit Fiend -> Pi Fiend, kills you with math.
Pit Fiend -> Put Fiend, always knows when to sell.
Pit Fiend -> Pit Friend, immune to falling damage, and always helpful to others who fall into the things.
Pit Fiend -> PT Fiend; totally ripped and ready to exercise you to death, too!
Pit Fiend -> Pity Fiend: you feel so sorry for it you could just offer your soul to it to make it feel better.
Pit Fiend -> Pith Fiend: You never know what will come out of the heart of a fruit Down There.