L.I.T.H.I.U.M. (Bramble's Conception)

The L.I.T.H.I.U.M. is the weakest of the Alkali Blimps, with only 130HP. Do not let this fool you, though, as it moves at the speed of 2.5 compared to the Red Bloon, making it as fast as a Ceramic Bloon.

Hitting it with a water-based attack makes it flash light, dealing 0.5HP damage to nearby towers, and also stunning them for 3 to 4 seconds. (Buildings are not stunned, and mechanical towers aren't either unless they have light sensors.) However, hitting it with water-based attacks is probably worth it as they deal x10 damage to the L.I.T.H.I.U.M., providing a devastating combo if said water attack deals extra damage to M.O.A.B.-class Bloons.

It can also temporarily battery-power itself, speeding itself up to x2 speed but also losing 0.5HP per second (as it has to sacrifice lithium to power the batteries).

The L.I.T.H.I.U.M. is more of a support blimp. It contains 3 H.Y.D.R.O.G.E.N.s and 1 Ceramic Bloon.