Why didn't Nintendo release a Mario Golf for the Wii?

[sethnintendo]

Gamerace said:

I'd love to know that myself really. A NPC Mario Golf would have been an easy 1m+ seller. An all new Mario Golf probably double that. After NPC Mario Tennis I certainly didn't expect a new tennis game.

There were other titles that could/should have gotten the NPC (or all new entries) too: Luigi Mansion would have been perfectly suited to the wiimote for example. While they didn't have a GCN version, Pilot Wings and Pokemon Snap would also have been brilliant on Wii. But instead two of these have gone to 3DS which annoys me, especially when it'd be fairly easy to port them to Wii as well.

I agree with a NPC Luigi's Mansion.  At least it looks like Luigi's Mansion 2 will be a very solid title for the 3DS (some are saying the 3D effects are some of the best yet on the 3DS).  How did the NPC Mario Tennis game play/control?  I was more of a fan of the original Mario Tennis (N64) but the GCN version basically played the same (if the power moves were turned off).  The power moves were neat at first but I disabled them after awhile.  I am also curious about NPC Pikmin.  Using the Wiimote seems like a perfect setup for Pikmin series even though I said earlier in a reply to Dr. Grass that it would be a better suited game for WiiU controller (was thinking the controller screen could be used in a neat way for the series).