Bobobo-bo Bo-bobo Explosive Battle Hajike Wars (ボボボーボ・ボーボボ 爆闘ハジケ大戦, Bakutou Hajike Taisen) is a video game for the Game Boy Advance, based on the manga and anime series Bobobo-bo Bo-bobo. It is the fourth Game Boy Advance game in the series. It was released on September 9, 2004 in Japan and was developed and published by Hudson Soft.