I probably missed something, but why does it stop at week 40? 3DS is further along than that now...
Very interesting data though, nice work! PSP sure was very powerful at the start, guess the DSlite is what 'killed' it. Looks like consumers in the west were skeptical with DS (maybe it was the dual screens) at first, funny to see 3DS doing the same pattern. Will be interesting to see it's development around the time the DS really skyrocketed.