The Btd3 Spike-o-pult hurls a spiked ball at bloons, but unfortunately with slow fire rate, popping 12 bloons each. It is used in btd3 to wipe out clustered, large-numbered groups of low ranked bloons. It first appears in btd3 but was canceled in btd4 and replaced as an upgrade for the Dart Monkey that also is there in btd5.