Blastapopoulos, Demon of the Core is a boss bloon first introduced in Bloons Monkey City however it was ported into BTD5 Steam/Mobile not too long after the first Boss Bloons popped up. It is a Lava/Magma environment bloon.
The creator of this page shall help you understand the Boss Bloon.
Bloons Tower Defense 5 Mobile/SteamEdit
Bloons TD 5 on Mobile/Steam got the new Bosses on May 29/30, 2016. Blastapopulos was one of them. He appears every 4 hours (not 100% definite if other Bosses appear) and rewards you with a random item. He looks like a ZOMG bloon from BTD5 on Flash (2011) with a orange/red look and magma/lava in random places on his shell. He also has more wings.
Blastapopopulos was first introduced in May 2016 (BTD5) as shown. He is a Boss Bloon. His ability is to launch a fireball at your most expensive tower and stun it for a few seconds. It gets worse. SOMETIMES, not all times, he will launch fireballs with no rest, meaning that he will basically disable your most expensive tower. You can counter this as will be shown below. While looking like a ZOMG, he is not as strong (excluding the fireball attack, in BTD5 that is.) Unlike BMC or BMCm, where you have Bloon Beacon powers that can bring the boss down to NOTHING, in BTD5 you get more of a challenge. He will never appear in natural BTD5 freeplay. He only appears in designated Boss spawn times, on Park Path. FUN FACT: Blastapopoulos was once called Blast*o*popoulos, with an O and not an A.
Since Blastapopoulos can only shoot ONE fireball at a time, spamming multiple towers will help. 0/3 or 2/3 Dart monkeys stand a chance against him. If you can afford it, you can do as much damage as possible at one point, then buy a quick x/4 Bomb Tower and activate the MOAB Assassin ability to kill him instantly if you get his HP down enough. Another strategy is to get towers that can kill Bosses with ease. Try the Spike Factory if you are curious. Note that selling a tower triggers the Fireball attack. He has 2000 health in BTD5.
Is he in BTD5's action version (BSM2?)Edit
Yes (mobile). He is the final boss of Bloons Super Monkey 2 and is on Level 100. This was probably from the idea of Bosses in BTD5 and BMC, although one is missing.
Art: Blastapopoulos VS Super Monkey.