Up for consideration is a Pinball Party prototype for the original Game Boy. These types of cartridges were typically sent out to different review magazines before the retail release to help build awareness of that particular game. 

This game was released in Japan as Hero Shuugou Pinball Party but was never released in the US or in Europe. This cart was obtained in the Netherlands from renown prototype collector Steem69, leading me to assume this cart was a review copy for a potential European release. This cart is on a typical game boy development board with a EPROM attached.

Labels on the EPROM and on the cart are still intact. Cartridge is in perfect working condition but sold as a collectible with no return privilege.

Shipping will be USPS Priority Mail with tracking, safely wrapped up and packed in a box to assure it reaches the buyer safely and in a timely manner. The Game Boy shown is not included, it is merely to show that the cartridge is working and is legit. Don't miss the opportunity to own a piece of gaming history. If you have any other questions or want additional photos, feel free to ask!