Kingdom Hearts: Chain of Memories uses a decidedly action-based combat system, and, as such, it makes more sense to categorize it as an Action RPG, especially with the Mega Man Battle Network games' categorization as such establishing precedent for quirkier action-based battle systems still "counting" as Action RPG gameplay.
This is a substantial remix of the Guardian Legend. Designed for those who had mastered the original game and wanted to try another challenge. The game features completely new maps and shooter stages, several new boss fights, and a new final stage & final boss.