What are the good and bad DSiWare/WiiWare/Virtual Console games?

[noname2200]

I'm updating the DSiWare thread, and I need opinions! So please, tell me which DSiWare titles you would recommend to others, and which ones you wouldn't. If there are any WiiWare and/or Virtual Console titles that you'd like to recommend for or against, I'm all ears as well. Thanks!