First, I think you can buy it, or another game that includes it on PSP. They dont release games to VC when there is competition like that. They want you to buy the $40 psp game instead of a $10 download.
Not to mention, this game being around 700mb would be a problem on your Wii storage. Pretty big for a VC game.
The solution?Spoiler Alert!Ive got your nose
Ill tell you this. I can pop in a disk and play it right now AND plug a PS controller into my USB.