Keroppi to Keroriinu no Splash Bomb! Nintendo

Keroppi to Keroriinu No Splash Bomb is a fun game featuring one of the Sanrio characters. Teruteru Chan is captured by some evil guy, or about as evil as yo can get with Sanrio, and taken off to a castle. Keroppi must work through four towers and defeat bosses in each one to rescue Teruteru Chan.

Wikipedia has a good page with the details of the Sanrio characters, so I won't cover that here. Or you can go to Sanrio.com. I'd rather mention that this game as some maze elements and some Bomberman elements, and it has powerups for the waterballoons Keroppi needs to place—range and number at once. You also have a pill for walking through walls and a helmet for invincibility—at least until you finish the level. Pills allow you to walk through most intra-level walls, too.

The first level is straightforward but the later ones have dead ends which can get quite tricky without a map. I sent them to GameFAQs too. You have to enter rooms and leave them, and sometimes there will be dead ends a few floors up. But even the fourth level has only twenty-five rooms. You can probably write things out by hand if you don't want too many hints. Basically, there are no heinous tricks in this game. You get enough lives and power-ups to make things pretty easy, and you get a password to start at level 2/3/4 when you make it that far. Really, you wouldn't expect a Sanrio- branded game to be too taxing given its target audience, but it still has some nice little maze puzzles.