WonderSwan



The Bandai WonderSwan was a competitor to the Game Boy that never made it outside of Japan, and so it doesn't have many games in English. Much of its titles are anime-licensed and RPGs, but it also has a decent number of (import-friendly) fighters, platformers, and action games.

The WonderSwan comes in three versions: the monochrome classic, the Color, and the Crystal. The Color and Crystal run on the same hardware, but the Crystal has a superior TFT screen and shorter battery life. All of them run on a single AA battery, with the following expected life:
 * Classic: 30-40 hours
 * Color: 20 hours
 * Crystal: 12 hours

There are also AC adapter and rechargeable battery pack accessories for those who'd prefer less battery expenditure.