Complex sentence: Matt Bozon has refused to blame Capcom, the publisher of the game, for responsibility in the game's failure, although they held it for 8 months after completion with the game finally releasing when the Game Boy Advance was already in its first year of existence.
Split into simpler sentences: Matt Bozon has refused to blame Capcom, the publisher of the game, for responsibility in the game's failure. This was despite Capcom holding it for 8 months after completion, with the game finally releasing when the Game Boy Advance was already in its first year of existence.