I started up Avenging Spirit today! According to pricecharting.com, it is the fifth most valuable GameBoy game, and loose copies, when they come up for auction, sell for an amount between $175 and $200. I don’t actually own a physical copy of this game, but a digital copy is readily available for on the 3DS eShop.
So far, it’s a fun, basic action platformer with a cool “possession” mechanic. Specifically, you play as a ghost, and you possess enemies. When you possess an enemy, such as a gangster, wizard, ninja, etc., you can use its unique attack and you can also use its unique abilities. Possessing certain enemies makes certain sections, such as boss fights, easier. It’s a fun mechanic, but the game really doesn’t do enough with it considering it’s release date (1992). Still, it has pretty good graphics, and it’s fun. I’m not quite sure it’s worth $175+, but it’s certainly worth the $5 I paid for a digital copy.