Wait! this isn't a rarity you might say, and you're partly right. The game was released by American Game Carts Incorprated. But in AGCI's early years, when
their mother company ShareData was getting into NES programming, they licensed all development tools from Color Dreams, including the cartridge design.
Before American Game Carts was formed, it seems that ShareData had plans to use Color Dreams cart design for their releases, and a small production run of
Chiller cartridges were made. Exactly how many carts ShareData had Color Dreams manufacture is unknown. Sofar around 5 of these carts have been found.
The game doesn't seem to be any different from the first batch of AGCI Chiller carts, the game says sharedata on the titlescreen. The product number on the
label, 700376 changed when the game was manufactured using AGCI's own cart design, to 700087.