>>25353193You for there to be a spike in sales there must have been people that didn't play Hoenn that bought Sinnoh right? It's not like people bought R/S and were like "fuck this is terrible, I'm returning it to fuck over the sales".
The actual reason for this is that Pokemon R/B/Y's target audience were entering teenage years where it became "uncool" to like Pokemon when R/S came out. By the time D/P were released they were old enough to not give a fuck about what other people think of them over their hobbies. I personally witnessed this phenomenon with several of the people at my school.
Plus there is the fact that the DS had a much bigger install base than the GBA because it's the most successful handheld of all fucking time.