Kingdom Hearts Chain of Memories is one of those need to have GBA games.
Graphics: KHCOM has acculy pretty good graphics for a GBA game, It's not perfect but compared to others this doesn't give you a head-ache. And also even while you move the graphics are still pretty good 8.5.
Sound: Sometimes the sound fails a little sometimes it goes up, overall the sound is pretty good not the best and the music is Above average 7.5.
Bosses: The game has alot of bosses 10+ later the bosses get even harder & this also includes a new group of bosses! 9.5
Storyline: Don't want to ruin it for you but this storyline can split up into diffrent parts. Overall the storyline is great! 9.5.
Fighting: Unlike KH ( kingdom hearts ) you use cards, yes i said CARDS, cards are battle attacks such as: kingdom key and three wishes, you can later after leveling do Sleights such as: Sonic Blade, Sliding Dash, Blitz, & more. Card Points ( CP ) are what you need to add more cards to your deck the more CP you have the more cards you can store, each card has points so you can only go to the max of your CP. This can get confusing but it is fun and good if you want to do some stratagy 9.5
Leveling: Everytime you level you get to pick one of the three options: Health up, Sleights or Card Points ( CP ). When your in the lower levels leveling doesn't take that long ( give or take 10 - 20 minutes of battling heartless )
When you get to the higher levels 70+ leveling takes longer ( give or take 30+ minutes of heartless fighting ) Leveling is usefull even if it takes a while 8.5.
Mutliplayer: This game doesn't have much multiplayer but you can fight another person who has this game and the GBA link cable. 5
Overall: I suggest this game to most GBA, DS, GameCube ( Using GBA device ) users. This game should last you ( including what happens after end of story ) 50+ hours, This game is a blast of fun and excitment! 8.5 - 8.6