Prototype Azumanga Daioh Advance
The Azumanga Gameboy Advance game that was released in April 25th 2003 had a prototype build of the game, of which the screenshots were used on advertising and the backside of the game box.
Differences
The stars are blue in the prototype rather than red in the final release. There are no dotted lines that connect the stars. The meters are flipped in the prototype version.
Notes
I'm not entirely sure what site photo 1 came from. It's not shown on the starchild website, but it is on the back of the gamebox