Dr. Monkey

 is the head scientist of the Monkey Kingdom who debuted in Bloons Super Monkey 2. His purpose in this game is to guide the player throughout the game by giving them helpful tips and making pre-wave comments. His scientific research can be utilized to counteract special bloon immunities and improve powers by purchasing it with Power Blops.

Dr. Monkey can also be unlocked as a playable character in the mobile version of BSM2 once the player gets at least a bronze medal on all 100 stages and beat Blastapopoulos, the game's final boss, on Stage 100. He can equip all seven weapon types (i.e. Darts, Ice, Rangs, Bombs, Magic, Storm, and Energy) and is immune to bloptonite and bad effects like the stuns of Blastapopoulos.

Dr. Monkey is also a Super Rare ally in Bloons Adventure Time TD, purchaseable for $460 in-game. He can be sharded for 300 shards. He can only be equipped to monkey heroes except Captain Cassie and Sam.

Dr. Monkey also reappears in Bloons Pop!. His role is to guide the player with scientific perspectives. Initially, he will show the player about his Bloontonium Collectors, where he introduces their generation of Bloonstones. Dr. Monkey also instructs the player about specific technical advice, including reminding to enable a working internet connection in order to access the game's online features.

Bloons Super Monkey 2 Mobile
In Bloons Super Monkey 2 Mobile, he can equip all types of weapons and is immune to bad effects like Bloptonite.

Bloons Adventure Time TD
Dr. Monkey makes appearance as an ally that can be placed. He throws chemicals that do no damage initially but remove special properties such as Camo and Regrow.

Bloons TD 6
In Bloons TD 6, he does not make an appearance in-game, but he is mentioned by Ninja Kiwi. For instance, he is said to be responsible for upgrading the HUD technology of the Robo Monkeys and above to gain random crits. His name makes an appearance as part of the Sandbox Mode introduction. As seen in Ninja Kiwi's 18th February 2022 blog, Dr. Monkey is also responsible for building Tech Terror.

Bloons Pop!
Dr. Monkey appears in the game as a science and technology expert.

Trivia

 * According to its upgrade description, Solid Doom was invented by Dr. Monkey.
 * Dr. Monkey will sometimes give a little spoiler about what bloon types will appear as a pre-wave comment.
 * The in-game description of Cyber Quincy mentions that Dr. Monkey developed technology to "rebuild" Quincy after he was injured by a DDT.
 * According to the Bloons TD6 5.0 Update video posted by Ninja Kiwi, however, the Cyber Quincy skin is said to have originated from Dr. Monkey sending Quincy to the future.
 * In Bloons Adventure Time TD, he does not have the negative effect immunity as he does in BSM2 Mobile.
 * According to Ninja Kiwi's 4th February 2022 blog, Dr. Monkey frequently works as a guest lecturer at Monkeyversity.
 * According to Ninja Kiwi's 18th February 2022 blog, Dr. Monkey made the Tech Terror