Grade bloons

Grade bloons are different, but have the same children, the pink bloon.

Appears in round 35

`F` grade
`F` grade are the slowest, but are like zebra,immune to explosion and chill.

The `F` grade bloon can evolve into the `D` grade bloon by `A` and `B` grade bloon when BFB gets dommed.

Appears in round 35

`D` grade
`D` grade are a bit faster ,and are also like zebras

The `D` grade bloon can evolve into the `C` grade bloon by `A` and `B` grade bloon when BFB gets dommed.

Appears in round 47

`C` grade
The `C` are conbination of zebra and yellow whit a twist.

The `twist` is that they can be camo and regen (the arrow points nothing, its just a joke)

As i said ,at BFB`s destrucion and the `A` and `B` grade bloons are there, these bloons evolve into the `B` grade.

Appears in round 76

`B` and `A` grade
The `B` and `A` are fast as pink, and are immune to explosion and chill,but grade `A` can stun a random tower over and over again.

The `B` grade can evolve by itself, and can evolve `F`,`D` and `C` grade bloons. The `A` grade can evolve other grade bloons, but can`t evolve by any means.

The `B` grade appears in round 101, and the `A` grade appears in round 144.