DSi Common Key???

What is it???
actually i have it but i don't know what it is for
haha i downloaded it from *CENSORED*
hahah
anyways what is it for?

The DSi Common Key is like the key you have to give to the Sims installer so it'll install.I don't know the status of stuff using the DSi Common Key, but the key SHOULD be used for making DSis think homebrew and pirated DSiware/DSi-Only games are legit. I may be wrong. That's just what I understand of it.

so CycloDS iEvolution has the DSi Common key?
well can't i just install it?

Probably a little more complicated than just putting it on your card. I'm sure it's something integrated into their flashcarts firmware.