Nintendo's been quite liberal about merchandising the Donkey Kong Country characters and having them appear in Mario medias (to the point even the awesomely horrible Bluster Kong has shown up in atleast one manga), but for whatever reason, the same can't be said for the WarioWare cast. The series is barely referenced in the spinoffs, there's very little merchandise of it and its characters and nobody besides Wario is featured in promo material.
Personally, I think it's a bit of a waste. Ko Takeuchi's creations are some of the most fun and lively design to come out of Nintendo in the past 10 years. There's more that could be done with them beside bookending minigame compilations.
Do you agree with the sentiment expressed in the title? Would you like to see WW characters show up in the sports/karting spinoff Mario games (and if so, which characters)? Do you think Ashley getting a good, usable 3D model for Extreme Pugilist Fraternity 4 could pave the way for more WW content to appear in Mario spinoff titles? Why do I ask so many useless questions?