That's the point, the main focus of Nintendo with the Wii are the new gamers/the mainstream. They don't believe that advertising a game for the core is necessary because they think they will sell for themselves. WRONG. Most of their core releases have bombed in Japan, bombed terribly. They all have in common the lack of advertisement and media previous to release.
Third parties followed suit. They saw that games like Wii Fit, Wii Sports, Mario Kart, Guitar Hero, etc were successful, and now that's what they are aiming for. Core games are a rare happening that will almost definitely never end up better on the Wii than they would have on other console.
Third parties don't advertise their core games, because they know they aren't top quality and they know that Nintendo themselves don't care to advertise core games either.
Retailers have already showed signs that they are unwilling to stock core Wii games. Excitebots, Punch Out, Muramasa, Little King's Story, Disaster: DoC are all examples. The core market is already a niche market on the Wii.
Proud poster of the 10000th reply at the Official Smash Bros Update Thread.
tag - "I wouldn't trust gamespot, even if it was a live comparison."
Bets with Conegamer:
Pandora's Tower will have an opening week of less than 37k in Japan. (Won!)
Pandora's Tower will sell less than 100k lifetime in Japan.
Stakes: 1 week of avatar control for each one.
