That was the original Pokemon. Pre-cultural phenomenon.
Now, I'm not stupid, and in no way expect even 1/15th of the sales of that title out of Z&W, but what I'm trying to say here is that poor first week sales don't mean something won't sell in the long run. Another good, and more relevant example is Katamari Damacy, which sold like crap its first week and ended up with more 500k sales WW, possibly close to a million. (The site doesn't have EU numbers)
See also things like Cooking Mama and Trauma Center - off-beat, non-traditional-hardcore games that sold meh in the first week, but caught some part of the general cultural imagination, and continued to sell for long after.







