Monkeys Together Strong

 is a Heroes Monkey Knowledge point in Bloons TD 6, added in Version 22.0. While this MK is active, heroes gain +5% XP per hero placed. To unlock, it requires eight heroes knowledge points invested, Hero Favors, and a one-time purchase of 1,000.

Hero XP
Equation for XP multiplier gained per hero is, where X is hero count.

Summary
Monkeys Together Strong essentially makes adding multiple heroes less of a downside, offsetting the penalty of split XP distribution per hero. On normal games, this benefit is just a basic but small XP bonus.

Tips

 * This MK is specialized for Co-Op Mode, and because XP is split among multiple heroes, this reduces the downside of extra Heroes.
 * With one hero, this effect is only +5% XP for the one hero. So in normal games, the XP bonus is simply +5%.
 * If placing Quincy on Round 1 with this MK plus Empowered Heroes and Hero Favors, he can reach Level 7 by Round 28 on Intermediate Maps. Without this MK, he would only barely miss out Level 7 by around a few hundred dollars.

Trivia

 * The name for this MK is based on the quote "apes together strong" from War for the Planet of the Apes.
 * The internal name for Monkeys Together Strong's MK icon is "MonkeysStrongerTogetherIcon.png".
 * In theory, the rate of XP increase versus number of heroes will result in the rate of XP bonus becoming minimal. As the equation for the hero XP distribution with Monkeys Together Strong active is, an infinitely high amount of heroes would still result in theoretically no XP increase.