Dorayaki
King Bowser
This idea includes not entirely videogames, but also merchandise, media adaption and other subjects associated with pop culture and commerce.
As we know, Princess Peach, as well as other Super Mario heroines have become the icons of videogames and even pop culture. However, we don't really see independent merchandise line or media adaption that further try to target at young girls, something Disney or toy companies have done for long time.
Also adding that other Mario's sub-brands including Yoshi Island, Luigi's Mansion, Warioware and Donkey Kong Country don't necessarily target at girls, so I wonder if there is also room to push a girls-oriented brand under Super Mario franchise.
Well, Peach was still a typical damsel-in-distress back in 2000's, so obviously Nintendo didn't think about young girl consumers. But now Peach has become a super active heroine in modern Super Mario franchise, I wonder if she is influential enough to push a girls-oriented brand that potentially makes Disney-level success? Or you think Super Mario is good enough to appeal girls with the inclusion of playable girls in mainline? Or you don't think Super Mario has what it takes to enter that market?
Showtime felt like a small test to see if Peach can stand on her own with new contents that target at girls, but sadly, this game got very mixed review in gameplay and story. Plus it seems to miss the chance to also count other recurring heroines (Daisy, Birdo, Dixie etc) for bigger branding.
(Offtopic: mentioning Disney, Wreck-it-Ralph also really wasted the chance to do a videogame princess gatherup despite Bowser was already invited to the very first movie.