c0rd on 10 November 2008
I would say yes - easily. Take a look at the first game's sales:
| Region |  Japan |
 America |
 Others |
Total |
| Total Sales | 1.24m | 3.45m | 0.81m | 5.50m |
Notice how unproportionally popular it is in America? That has to be Disney at work... besides Pokemon, it's the best selling RPG ever in America. The sequel looked like this:
| Region | Japan |
America |
Others |
Total |
| Total Sales | 1.16m | 2.06m | 0.47m | 3.69m |
I'm guessing KH2 didn't do so well because it didn't have much to attract the crowd more interested in Disney. Its story only got more complicated (no Disney in the whole Roxas crap), and the "improvements" on the game took away the simplicity the first game had.
That's just my theory, anyway.
