Theres Alarmo on Universal Updater. Haven't used it myself yet tho.

I remember using my OG phat DS as an alarm clock when I was younger.

im gonna try it ill let you know if its good or not so you don't have too :3

tysm person who is trying it out for me :D

If you have warioware gold and unlock one of the clocks you can use it

so tried it it dose work for what its worth but i dont think it should replace your phone and im not sure if it needs to be left open to work as well and its a bit weird setting the time but try it and lmk how your experience is