>>35335057False equivalency. Sonic team is chronically underfunded and though they are rushed it is usually die to poor management and inefficient scheduling than lack of total overal time. Plus Sonic '06 was made with a lot of new technology, and was meant to be a whole new experience.
Pokemon has a workflow that's been consistent and predictable for decades, they always know when the next game will be out and behind work long before then. They also don't regularly reinvent the series, they can rely on turn base battles and existing pokemon and mechanics to grant a solid foundation even if the new material is shaky or outright bad.