8.2
http://www.gamespot.com/gba/action/hoshinokirby/review.html
"All told, Kirby & the Amazing Mirror is a great entry in the Kirby library of games. The platform mechanics are solid, as always, and the adventure is certainly fun. The single-player game is engaging; it features a wealth of items to collect and it rewards you with an extra minigame mode as well as a new accessory once you've finished it. The four-Kirby mechanic is interesting and it works well in multiplayer. If you're looking for pure platforming action with plenty of variety, Kirby's latest adventure most certainly fits the bill."
http://www.gamespot.com/gba/action/hoshinokirby/review.html
"All told, Kirby & the Amazing Mirror is a great entry in the Kirby library of games. The platform mechanics are solid, as always, and the adventure is certainly fun. The single-player game is engaging; it features a wealth of items to collect and it rewards you with an extra minigame mode as well as a new accessory once you've finished it. The four-Kirby mechanic is interesting and it works well in multiplayer. If you're looking for pure platforming action with plenty of variety, Kirby's latest adventure most certainly fits the bill."