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Advance Guardian Heroes is a 2D sci-fi fantasy belt-scrolling role-playing beat-'em-up developed and published by Treasure (Company), with its overseas release published by Ubisoft, for the Game Boy Advance (Platform) in North America on September 14, 2004, in Japan on September 22, 2004, and in Europe on February 18, 2005.
A handheld sequel to the 1997 Saturn game Guardian Heroes (Game), Advance Guardian Heroes updates the original's formula with a new story (along with a new protagonist), a more traditional belt-scrolling system (instead of a multi-plane system) and new techniques (including counter-attacks, magic barriers, homing jumps, and a powered-up "Hyper Mode"). It also features linked multiplayer for up to two players in co-operative play and up to four players in versus play.
The game's story takes place long after the original, with the titular heroes (Han, Randy, Ginjirou, Nicole, Cerena, and Valgar) defeating the forces of the mage Kanon with the help of the undead warrior who possessed the Soul Sword, only for them to become divided on whether to serve the Sky Spirit as immortals or to perish as rebels. After the resurrection of Kanon by the immortal Zur in the far future, an unknown soldier of a new resistance makes a desperate attempt at stopping his new forces by becoming a vessel of the Soul Sword itself.
Advance Guardian Heroes is a side-scrolling style 2D beat 'em up. Unlike the previous game in the series that had players moving between three separate planes, in Advance Guardian Heroes players can freely move anywhere around the screen.
Players can do a base melee attack with the B button and a jump with the A button. While in the air players can do a downward attack by pressing the attack button.
There is a block that can be used by holding the R button. Pressing the attack button while holding the block button will allow players to use a special attack. These special attacks can be cycled through by pressing the L button.
When defeating enemies, crystals will be dropped which can be collected. When enough of these crystals are collected players can upgrade their stats. The opportunity to upgrade comes between stages.
There are seven different stats that can be leveled up:
The game includes a new starting roster of three characters, with 18 unlockable characters. Unlike the previous game, these characters can be used in any game mode.
Unlike the previous game, each of the game's main heroes are palette swaps with different base stats and magical abilities. They are also silent protagonists.