This teeny-tiny article needs some work. You can help us by expanding it.
Mallet Legend is an unlicensed action game for the Sega Mega Drive developed by AV artisan and published by Realtec in 1993. In the US it is known as Whac-a-Critter or Mallet Legend's Whac-a-Critter depending on the source. It is one of the more interesting unlicensed titles for the system, as it relies on a similarly unlicensed accessory, the Smash Controller, released by Innovation in the US.
In Taiwan, both the Smash controller and game cartridge were bundled together, however in the US the two were sold separately.
The game is a Whac-A-Mole clone — simply hit the button on the controller corresponding to the hole where a critter pops up before it disappears. After hitting enough, you get a much harder "boss battle" before moving on to the next round.