Undead Movement

Undead Movement is an attack behavior characterized by the movement along the bloon track against the direction of the bloons. It is part of the damage types family. It has been introduced in Bloons TD 6 with the Necromancer: Unpopped Army.

Undead Movement is represented on the Bloons Wiki as, the upgrade artwork for Necromancer: Unpopped Army in Bloons TD 6, which depicts an undead bloon. Undead Movement is specifically about movement along the bloon track against the direction of the bloons. Even if necromancy is not involved, an attack with Undead Movement always follows along the bloon track from which it spawned from. Undead Movement usually appears before Spawn, as the attack usually appears from the middle of nowhere.

Necromancer: Unpopped Army and Prince of Darkness are the main examples of towers capable of making attacks with Undead Movement. Sauda's Sword Charge is categorized as Undead Movement despite Sauda having no relation with necromancy whatsoever, but the backwards attacking behavior of the Sword Charge ability acts very similarly to Undead Bloons, although moves much faster and creates multiple copies of herself depending on the permutations of possible entry-exits.

In Bloons Adventure Time TD, Flame Princess's Flamebits have the Undead Movement attack behavior, as the Flamebits spawn where the transformed bloon was and rapidly move along the bloon track against the Bloons' movement to the track entrance that was active on the round it spawned on.