It's a piece of Wiiware sold on the Wii shop channel for 800 points.
You either need to go through a bunch of trouble to download the Wii Homebrew channel, get a DS emulator for said channel, and WarioWare DIY ROM (illegally) for said emulator. Or you can buy WarioWare DIY Showcase through WiiWare. (this IS legal.) However, WarioWare DIY Showcase does not allow you to MAKE the games--just play them and download them.
Yep you can also share them DS to DS for that matter.
You need WarioWare D.I.Y. Showcase which you can buy from the Nintendo Shop Channel (or something) and you need WarioWare D.I.Y. for the NDS.
WarioWare D.I.Y Is for The DS Yeah you can play this on the Wii but you have to have a ds with the game on it, a Wii and you either need to go through a bunch of trouble to download the Wii Homebrew channel, get a DS emulator for said channel, and WarioWare DIY ROM (illegally) for said emulator. Or you can buy WarioWare DIY Showcase through WiiWare. (this IS legal.)
Showcase is on channel 39
DIY = Do It Yourself
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Showcase Diva was created in 2001.
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Showcase TV ended in 2009.
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Showcase in a Suitcase was created in 1980.