To eliminate an unnecessary character display and realize a speedy transformation by assigning selective orders to an original character and a plurality of transformation characters, and selectively displaying the character corresponding to the input frequency inputted within a prescribed transformation instruction signal receiving time.

In a handy liquid crystal game machine for mounting a cartridge, the selective orders of an original character (O-character) and a plurality of transformation characters (transformation characters) are stored in the transformation order memory part 37 of an internal RAM 25. The initial data value corresponding to the character selected from the O-character and the transformation characters and appearing during game development is stored in a data memory 38. The input frequency of a transformation instruction signal inputted by the button operation of an operation part 21 within a prescribed transformation instruction signal receiving time is counted, and the character corresponding to this input frequency is selected and displayed on a liquid crystal display part 2.