Skeleton Bloons

Skeleton Bloons are simple Bloons. However, they have three forms:

Form 1
Just a normal White Bloon with black parts. Basically a White Bloon in speed, however it has 2 hidden parts: arms. These arms have 3 HP each. On destruction of both arms, it becomes...

Form 2
Now it is black and has 4 arms with 5 HP each. Moving as fast as a black bloon, this version has an attack:

Swat: Just swats a tower with an arm for 5 HP damage. Very simple.

Form 3
Now it is red with 6 arms. Each arm has only 3 HP each, and the bloon itself has 30 HP. It moves at the speed of a Red Bloon, and when all arms are destroyed it moves at a speed between a red and a blue. It has three attacks:

Swat: Just like last time, only it is 50% more common and does 7 damage.

Shatter: Sacrifices 2 HP from any arm (or the body) to fire 3 shards that do 4 damage each.

Summon: Summons 3 Form Ones that don't turn into Form Twos. When the arms of these are destroyed, the bloon itself has 5 HP.

Notes and Trivia

 * There is a 5 second delay between forms where it is bright green and turning into the next form. It cannot be damaged when changing forms.
 * This (strangly) takes double damage from Snap Freeze and 1 damage from any freeze, probably because the ice cracks the bones.