I did some (online) research to double-check myself, even after checking the 3DS manual, & all I came up w/ was that the 3DS doesn't have an alarm clock feature, & that the DSi did. I never owned a DSi, so that info was somewhat irrelevant to me. Anyway, so I don't go off topic,... does the Mario clock fully function on the 3DS? Specifically, for example, I read on the review here for it, that it will work in sleep mode. If I freeze the app(by hitting the Home button), & return to my 3DS home menu, will the alarm still function? Likewise, (as a continuation of the last question,) will it still function once on the Home menu, & the 3DS lid shut? Or does the clock, & its alarm function when you shut the 3DS lid, only while you are still in the (Mario clock) app itself? Thanks in advance, NLifers!

It's only works with the app open. You can close the lid but only if the app is open. Exit to the home screen and the alarm will not sound.

One night I lost my iPhone cable and could not charge my phone to use the alarm to wake up so I had to download the the Mario clock to do the trick and tested its parameters. But I ended up waking up before water Mario theme came on so I still haven't be awakened yet by a Mario tune.

Thank You, very much! I appreciate the answer.

I bought this just for the game. Great timewaster.

I have the Animal Crossing clock, love it.
I also have the tendency to wake up before the tune starts for some reason.