Um I would say 95% of all the time I have spend on
console games were multiplayer games:
mario kart, street fighter, secret of mana,
golden eye etc. Only on Zelda3 and Mario64
(and may be a few other games) I have played the
one-player mode a lot. But on gameboy advance
it's like 99% of playing is multiplayer mode
(tetris , pokemon, mario kart). We play Mario kart
almost each day

Graal Gameboy advance looks
quite good (i think better than Graal2001

and will concentrate on the 2-4 player mode.