There were many games in the GBA's Emblem of Fire series, and each game had its own unique characteristics and gameplay. Therefore, which one was the most fun depended on one's personal interests and gaming preferences. If you were interested in strategy games, then Emblem of Fire: Strategy Version was a good choice. The game was highly strategic. Players needed to build bases, recruit soldiers, develop technology, and so on to advance the story through battles and puzzles. If you like action games and role-playing games, then Flame Emblem: Hero is a game that you can't miss. The game had gorgeous graphics and a smooth combat process. Players needed to explore the game, recruit characters, master skills, and so on. In addition, Emblem of the Fire: Remake was also a well-received game. The game remakes the original game and adds new content and plot. Players can review the world view and plot of the original game through the game. Therefore, which one was the most fun depended on one's personal interests and gaming preferences. I suggest you try a few games first to find the type you like, and then choose the game you're most interested in to experience it in depth.