So you're basically crying over 4 games. That can be counted on one hand. LOL.
Like Nintendo had bigger concerns at that point than making sure Rol got a token 4 games for Wii. Tough shit, but there are development realities that you're being naive to. Nintendo didn't have "spare resources" to work on token Wii projects, the 3DS and Wii U launch windows were in dire straights as it was, diverting resources to unnecessary Wii projects would've been about the dumbest thing they could have done at that point.
Even the 4 games on DS, tiny as that is was probably a stupid idea, they needed every hand on deck for the 3DS and Wii U because they had huge issues getting enough software out for those machines quickly enough.
The Game Boy and PS2 are the best examples really, they got games released for them for a few years while the new platforms came in.
We know that it worked in those cases, the question is, would it work in the cases where it wasn't done or wasn't done properly (Wii, SNES, DS).
Also, it would have been possible to spare resources optimally (supporting as many coexisting consoles as they could), had they planned their tech right and allowed WiiU games to be playable on the Wii or even on the 3DS like I mentioned earlier (using a development framework). By the way, they knew about this problem and that's why they made Smash for 3DS/WiiU, it was an attempt at what I suggested.