I already own Yumi (I can testify to its awesomeness, BTW) but I'll enter this anyway since talking about random handheld games is fun, and I'm sure my brother would love a free copy if I won it. So here I will shill one of my favorite DS games, Prey the Stars! (Or Gabu Gabu Planet in Japan.)
The only reason I've even heard of it is because Koei promoted the shit out of it in Nintendo Power, usually in double ads alongside some other game. (Pop Cutie: Street Fashion Simulation, I believe. Never tried that one... and I doubt I ever will.) Weirdly enough the ads focused more on the fact that some figure designer named Touma designed the characters than the actual game itself. Considering the majority of players would have no clue who Touma is or why they should care that he's involved, I'm not sure why they did this...
Anyways, on to the actual game. You can choose between 4 wacky dog-like aliens with the ability to bite, lick, and suck objects. These objects are scattered around flat grids, and you have to run around trying to eat as many as possible. However, they all have different elements, so there's a bit of strategy with what buttons you mash. An electric object is painful to bite, so try sucking it, while a watery object would require licking.
All of these elements correspond to various powers you can get, like an electric ball, a metal blade, a gust of wind, etc. that can be used to attack opponents. Sometimes if you eat three of the same element in a row, you can turn into a giant monster that speedily devours objects and foes without a second thought. It can get pretty wild. In addition, eating certain "POW" objects fills your belly meter, which makes you get grow in size. The larger you are, the bigger the objects you can eat, and you can even squish opponents beneath your feet if you're bigger than them.
Although it's clearly designed around multiplayer since you're always going up against an opponent, there's also a fun single-player mode where you... um... well, I don't really know what you do since the cutscenes don't make any sense. You go around eating things to free spirits from the Earth or something, and once liberated they engage in some bizarre one-sided dialogue with your chosen monster between levels. Here's one such example of this masterful storytelling:
Besides all this, there's also a ton of skins to unlock that not only change your look, but also alter your stats in various ways. They've got a bit of a loot aspect to them since there are a lot of different stat modifiers, and you can find multiple versions of the same skin with randomized stats (though you can only keep one at a time). You get these by doing various challenges like eating X amount of objects or hitting X opponents with a power. Later on it starts getting kind of cheap since they'll hide the objective with question marks (Use ????? on opponents ?? times) but it's not too annoying since they're fairly easy to guess and the levels aren't that long anyway.
In terms of graphics, it's pretty barebones, but it gets the job done. The music is nothing to write home about either, although the Mega Center theme sounds pretty nice, and the way the menu music slightly changes depending on what selection you're making is cool. I've only ever seen that done in a few other games, like Mario Kart Wii and Ridge Racer 3D.
Overall, it's not the most amazing hidden gem ever, but I really liked it! Surprisingly enough for a niche game like this, it even supported Wi-Fi multiplayer (not that I ever found anybody online to play with, of course).
The only reason I've even heard of it is because Koei promoted the shit out of it in Nintendo Power, usually in double ads alongside some other game. (Pop Cutie: Street Fashion Simulation, I believe. Never tried that one... and I doubt I ever will.) Weirdly enough the ads focused more on the fact that some figure designer named Touma designed the characters than the actual game itself. Considering the majority of players would have no clue who Touma is or why they should care that he's involved, I'm not sure why they did this...

Anyways, on to the actual game. You can choose between 4 wacky dog-like aliens with the ability to bite, lick, and suck objects. These objects are scattered around flat grids, and you have to run around trying to eat as many as possible. However, they all have different elements, so there's a bit of strategy with what buttons you mash. An electric object is painful to bite, so try sucking it, while a watery object would require licking.

All of these elements correspond to various powers you can get, like an electric ball, a metal blade, a gust of wind, etc. that can be used to attack opponents. Sometimes if you eat three of the same element in a row, you can turn into a giant monster that speedily devours objects and foes without a second thought. It can get pretty wild. In addition, eating certain "POW" objects fills your belly meter, which makes you get grow in size. The larger you are, the bigger the objects you can eat, and you can even squish opponents beneath your feet if you're bigger than them.
Although it's clearly designed around multiplayer since you're always going up against an opponent, there's also a fun single-player mode where you... um... well, I don't really know what you do since the cutscenes don't make any sense. You go around eating things to free spirits from the Earth or something, and once liberated they engage in some bizarre one-sided dialogue with your chosen monster between levels. Here's one such example of this masterful storytelling:
Hi! You can really wolf it down, can't you?
Hm? What's wrong? Why the long face?
You're wondering where everything you eat goes? The scientific explanation has a lot to do with the action of your stomach. It's called the "guniguni" action...
If you want to know what "guniguni" means, look it up in a dictionary.
...But you will find nothing!
You shouldn't be worrying about these things anyway!
Besides all this, there's also a ton of skins to unlock that not only change your look, but also alter your stats in various ways. They've got a bit of a loot aspect to them since there are a lot of different stat modifiers, and you can find multiple versions of the same skin with randomized stats (though you can only keep one at a time). You get these by doing various challenges like eating X amount of objects or hitting X opponents with a power. Later on it starts getting kind of cheap since they'll hide the objective with question marks (Use ????? on opponents ?? times) but it's not too annoying since they're fairly easy to guess and the levels aren't that long anyway.

In terms of graphics, it's pretty barebones, but it gets the job done. The music is nothing to write home about either, although the Mega Center theme sounds pretty nice, and the way the menu music slightly changes depending on what selection you're making is cool. I've only ever seen that done in a few other games, like Mario Kart Wii and Ridge Racer 3D.
Overall, it's not the most amazing hidden gem ever, but I really liked it! Surprisingly enough for a niche game like this, it even supported Wi-Fi multiplayer (not that I ever found anybody online to play with, of course).