GameSpot

Review by Richard Torres: "Golden Sun: The Lost Age is an excellent follow-up to the original Golden Sun." [Score: 8.6 out of 10]
http://www.gamespot.com/gba/rpg/goldensunthelostage/review.html

IGN

A Review by Craig Harris of IGN titled, "One of the top RPG games on the GBA continues in a second chapter on the handheld," with a score of 9/10.
http://gameboy.ign.com/articles/393/393159p1.html

GameSpy

Review, by Raymond Padilla: "More of a continuation than a full-on sequel, The Lost Age is a sterling game that fans of 16-bit RPGs will cherish." [Score: 86 out of 100]
http://www.gamespy.com/reviews/april03/goldensun2gba/

GameZone

Review, by Louis Bedigian: "Regardless, Golden Sun: The Lost Age is spectacular game, one that every RPG fan should get." [Score: 8.9 out of 10]
http://gameboy.gamezone.com/gzreviews/r20485_GBA.htm