Braindump:
- Boyruy = Boken (Shining Force NPC)
- The Engineer = jhuck
- Luna = from Lava Blade
- Merchant = Spelunky Shop Keeper
- Moto = Short for Motoaki Takenouchi (Shining Force 2 composer)
- Raga = derived from lagarto, Spanish for "lizard"
- Cube, Cyclops = from Onslaught! Arena
- Face Hugger = from Aliens universe
- Lurker = Zora from The Legend of Zelda
- Ironsword = Ironsword (NES) AKA Wizards & Warriors II
- Slowrd = slow sword
- Maro's Statue = combination of several Armos variations from the Zelda universe
and many mooooore