Monkey Apprentice is a tower in the BTD series, debuting in Bloons Tower Defense 4, and continuing into Bloons TD 5. It launches a blue ball that can pop 2 bloons; it can be upgraded to add many other attacks. After its final upgrade has been purchased, it is known as a Monkey Wizard (BTD4) or a Master of Air/Master of Fire (BTD5). __TOC__