I'd take Nintendo, but just to make some changes like:
- Hey, this DS thing actually has a GBA inside, but the link cable doesn't seem to fit anywhere, let's take it out
Couldn't they have put a link cable shaped port that could be used for both charging and link play? (DS to GBA or GCN)
- I know the Wii has 2 usb ports but, let's make SD cards the only other way to save stuff in it other than the 512MB of internal memory
What about using the USB ports for extra storage? Maybe just with a USB flash drive, or a USB hard drive
- The Wii can play music in the photo channel!...but only in it
This was plain stupid, we need a music channel
- The Wii has a DVD drive!...only for games
The DVD drive can easily play DVDs (trhough the use of homebrew), so it's not impossible to do it.
- Let's put a (crappy) speaker in the Wiimote
A microphone would've been a better idea, the speaker is so crappy that I prefer to have it off
- New Super Mario Bros. Wii is great, and they'll love to use the Wiimote's motion sensor to do stuff, too bad they won't be able to use other controller options (GCN controller, classic controller)
Spin jump? "A" button, they've done it before
Controller waggle? (like where you're in a bubble) button mashing
Lifting stuff with controller shaking? Why did they even add this one?
Stuff where you have to tilt the controller? this was wasn't that obvious but the GCN and classic controller have analog shoulder buttons it shouldn't have been impossible to figure this one
Those are the things I thought of right now, but I bet there are a ton more