For those of you with an R4 or other method of playing homebrew on the DS, I strongly suggest you check out nyarla‘s in-development game Magnetic Shaving Derby.
It is currently up to version 0.5, and here is a direct link to the zipped .nds file (mirror on nuxx.net).
I think it could still use a bit of work, but it’s a really fun quick-play game. It would definitely be interesting if there was something like a bonus scrotum shaving round, a goatee / sideburn bonus, and maybe slightly different control of the magnet / blade, but as it stands it’s a pretty darn fun game.
UPDATE: I’ve been told that there’s another version coming soon, so keep an eye on nyarla’s site for more info.