It's not a pattern yet. Boogie got mixed/bad reviews, and I expect Dewy to get mixed/good reviews. But Dewy isn't even out in America yet, so we can't totally judge sales performance yet.
Also... Boogie is a "casual" game but Dewy is a "kiddie" game, not "casual." Get it right! :P
Hopefully both games do well enough when all is said and done.
"[Our former customers] are unable to find software which they WANT to play."
"The way to solve this problem lies in how to communicate what kind of games [they CAN play]."
Satoru Iwata, Nintendo President. Only slightly paraphrased.