1. An unused tower in Bloons TD 1/2 that was forgotten and was accessible in the game's files, but in-game it shoots out a high-piercing spike ball which pops a lot of Bloons in a straight line.
2. A tower in Bloons TD 5 Expansion that functions like in BTD1 but with some powerful upgrade and so much more! Also a tower in the XtraCards mod which functions the same as in BTD5E.
"Good thing that a modder added the Spike Ball Shooter in BTD2, because it was unused in-game."
"Spike Ball Shooter seems pretty cracked and it can defend BFBs very well."