Name: Wonder Boy in Monster World
Platform: Sega Genesis / Mega Drive
Region: USA
Media: Cartridge
Controller: Gamepad
Genre: Platformer
Gametype: Licensed
Release Year: 1991
Developer: West One
Publisher: SEGA
Players: 1
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Townsfolk cower in fear as legions of deadly monsters invade the planet. Only Wonder Boy can fight smart enough - and tough enough - to wipe out the terrible beasts. Sleuth out secret clues to thwart the undead. Match wits against an evil force of otherwordly dimensions. And prove the awesome strength and courage of the amazing Wonder Boy! Team up with a companion to battle scores of fiendish monsters. Play magical tunes to enter secret rooms and passageways.

Hints:

 - Stay at the Inn for free - 
Any Inn throughout the game will still let you spend the night, even if you don't have enough gold. If you're short, they will take whatever you have, even if you don't have any gold at all.

http://www.gamefaqs.com/console/genesis/home/586607.html