Bomb Tower is a tower in the BTD series. It is called Cannon in BTD2 and BTD3, Bomb in Bloons Tower Defense 4 (iPhone/iPod Touch), and Bomb Shooter in Bloons Monkey City. The Bomb Tower is a cannon that fires bombs at bloons to pop them. It can pop more than one at once if there enough gathered by the explosion point. An unupgraded Bomb Tower is completely ineffective against Black and Zebra bloons due to their immunity towards explosions. Using Frag Bombs makes this tower more powerful, and allows it to pop Black and Zebra Bloons. (Group attacks work best)