This is a really interesting thread.
I got a theory. Seems like a lot of times when popular ninche games come out for the Wii we get some threads here about people having no trouble finding any copies at local retailers. With such of abundance of games being released on the Wii, maybe retailers just buy a small bit of everything and the better games tend to always end up being understocked untill the retailer realizes there's a real demand there. Games like Pool Party and the lot wind up unsold, while games with good word of mouth sell out their meager stock and lead to more restock orders.
For anyone wondering, Monster Lab is an obsecure RPG where you build your own Monsters to fight. IGN gave it an 8, Gamespot and Nintendo Power gave it a 6.5.
