Special Items provide special buffs to the player in Bloons Monkey City Special Missions. Special Items can be gained by successfully completing a Treasure Chest tile or a certain Special Mission. Special Items are unique and kept between cities, and the player's accumulated items are found under the Special Items tab.
Dragon King*: The Mighty Dragon King will soar across the skies of your city, protecting all who dwell within. (This will give the player a dragon king that flies over the city) Obtained from beating the Dragon Slayer special mission. (*Only obtainable during the Chinese new year event on the iOS platforms.)
Egg Scrambler**: Scramble your emergency defenses. Triggers a free monkey boost once per game when you lose a life. Obtainable by getting the grand prize in the 2015 easter egg collecting event (**This was available during the Easter event on the iOS and Android platforms.)
Golden Egg Scrambler**: Scramble your emergency defenses! Automatically pops the first non-MOAB bloon that escapes during a game and triggers a free monkey boost once per game! Obtainable by getting the grand prize in the 2016 or 2017 easter egg collecting event (**This was available during the Easter event on the iOS and Android platforms.), however you can only earn the Golden Egg Scrambler once.
(Unused/Unknown) Portal Artifact: An unknown item, only appears in early released BMC. It's not impossible to find it and the only hint of it is the quest "Ancient Portal Knowledge", which says that it's lost and player needs to reassemble it. It's unknown what it was supposed to do, there were 5 pieces of them, and it's unknown if it's still in game's files. It got removed soon after official release.