Ninja Kiwi released Bloons TD 6 in June 2018 and has kept adding to it ever since, past 25 monkey towers split across the Primary, Military, Magic and Support categories. Every tower has three upgrade paths of five tiers, but you may only take two paths and the second one caps at tier 2, which is the single rule that shapes every strategy in the game. Rounds run to 100 in standard play, with the MOAB arriving at 40, the BFB at 60, the ZOMG at 80, the DDT at 90 and the BAD at 100.
Boss fights are where Bloons TD 6 tests everything you've learned. This guide covers strategies for bosses across all areas, organized by progression order. For general combat techniques, see our combat guide.
Boss Difficulty Overview
| Area | Difficulty | Recommended Build | Key Equipment |
|---|---|---|---|
| Monkey Meadow | Easy | Military | Ninja Monkey |
| Cubism | Moderate | Military | Ninja Monkey |
| Geared | Hard | Primary | Dart Monkey |
| Dark Castle | Very Hard | Primary | Dart Monkey |
| Muddy Puddles | Extreme | Primary | Dart Monkey |
Monkey Meadow Bosses
Area difficulty: Easy Recommended level: Beginner difficulty Recommended build: Military with Ninja Monkey
Strategy
The first bosses teach core combat mechanics. Focus on learning patterns rather than dealing damage. A tower can reach tier 5 on one path while a second path is capped at tier 2, and the third path stays empty. This is your primary tool here.
Key tips:
- Don't rush. Learn the attack patterns first.
- Use Two path upgrade limit to create safe windows.
- Ninja Monkey is enough to handle everything here.
Cubism Bosses
Area difficulty: Moderate Recommended level: Beginner difficulty Recommended build: Military with Ninja Monkey
Strategy
Early game bosses test your understanding of Bloon properties and immunities. Players who skipped learning this mechanic will hit a wall here.
Key tips:
- Bloon properties and immunities is critical for these fights.
- Farm Ninja Monkey upgrades if you're struggling.
- Consider switching to Military if your current setup isn't working.
Geared Bosses
Area difficulty: Hard Recommended level: Advanced difficulty Recommended build: Primary with Dart Monkey
Strategy
Mid-game bosses are the major skill check. They combine multiple mechanics and punish players who rely on a single strategy.
Key tips:
- You need both Two path upgrade limit and Monkey Knowledge and hero levelling mastery.
- Dart Monkey makes a significant difference. Get it before attempting these.
- See our combat guide for advanced techniques.
Dark Castle Bosses
Area difficulty: Very Hard Recommended level: Expert difficulty Recommended build: Primary with Dart Monkey
Strategy
Late-game bosses are serious challenges. Build optimization matters as much as mechanical skill.
Key tips:
- Make sure your build is fully optimized.
- Dart Monkey at max upgrade is recommended.
- Study each boss's attack patterns. Most have 2-3 phases.
Muddy Puddles Bosses
Area difficulty: Extreme Recommended level: Expert difficulty Recommended build: Primary with Dart Monkey
Strategy
Endgame bosses are the ultimate test. They require mastery of all combat systems and an optimized build.
Key tips:
- Top-tier build with best-in-slot gear is mandatory.
- Master every mechanic. See our combat guide.
- These fights reward patience and pattern recognition above all else.
General Boss Tips
- Learn before you fight: Spend your first attempt observing attack patterns. Don't try to win on attempt one.
- Match your build: Some bosses favor certain builds over others. Don't be afraid to switch.
- Upgrade your equipment: A max-upgraded Dart Monkey trivializes fights that seem impossible with weaker gear.
- Use Two path upgrade limit: The core combat mechanic is your best defensive tool in every boss fight.
- Check the walkthrough: Our walkthrough tells you when you're ready for each boss.
More Bloons TD 6 Guides
- Bloons TD 6 Bloons TD 6 Overview
- Bloons TD 6 Best Builds
- Bloons TD 6 Tier List
- Bloons TD 6 Walkthrough
- Bloons TD 6 Beginner's Guide
- Bloons TD 6 Tips & Tricks
- Bloons TD 6 Weapons Guide
- Bloons TD 6 Combat Guide
- Bloons TD 6 Maps & Locations
- Bloons TD 6 Crafting Guide
- Bloons TD 6 Classes & Characters
Similar Games
If you enjoy Bloons TD 6, check out these related guides:
- Sid Meier's Civilization V Boss Guide: strategy game with similar mechanics
- Mount & Blade II: Bannerlord Boss Guide: strategy game with similar mechanics
- RimWorld Boss Guide: strategy game with similar mechanics
