The Summer Fuse Machine is back in Steal a Brainrot, and this time it's packing 16 brainrots with a full beach theme slapped on top. Introduced in Update 52 on May 23, 2026, the machine works exactly like the standard Fuse Machine but swaps in summer-exclusive units from Mythic rarity upward. The grand prize is Dragon Aquanini, a Secret-tier beast earning $375M per second. Getting there requires the right input brainrots, good timing, and a solid plan for the 90-minute wait.
How does the Summer Fuse Machine work?
The Summer Fuse Machine sits at the center of the map, right next to the Shop, overlooking the conveyor belt where brainrots spawn. Walk up to it, place four of your own brainrots inside, then press E to open the fusion menu. The machine shows you the possible outcome before you commit. If the result looks good, hit the Fuse button and start the timer.
The fusion time scales with the rarity of what you're going to receive:
- Epic or lower: 15 minutes
- Brainrot God or lower: 30 minutes
- Secret or OG: 90 minutes
Higher-rarity input brainrots push the outcome toward better results, so don't waste the machine on low-tier fodder if you're targeting Secret pulls.
When your fusion finishes, the resulting brainrot does NOT teleport to your base automatically. You have to physically carry it back, which means other players can steal it mid-run. Set traps along your return path before the timer expires, or run the machine on a private server to cut out the risk entirely.
One mechanic worth knowing: if any of your four input brainrots carry a Mutation, there's a 10-20% chance the output brainrot inherits it. Stack all four inputs with the same mutation (Lava, Galaxy, or Radioactive are the high-value picks) and that inheritance probability increases significantly.
All 16 Summer Fuse brainrots and their income rates
The Common through Legendary pool carries over from the original Fuse Machine. Everything from Mythic upward is brand-new and summer-exclusive. Here's the full breakdown:
Bombardiro Vaccariro has an 85% pull rate from low-tier Secrets, making it the most accessible Secret in the pool. If you're not sitting on Strawberry Elephants, start here and work your way up.
What makes Dragon Aquanini worth chasing?
Dragon Aquanini is the headline unit of this event. Visually it's a blue dragon covered in starfish and coral formations, with massive blue wings and no fire breath (fitting for an aquatic variant). It earns $375M per second, making it the second-highest-earning Secret brainrot in the entire game, sitting just below the Griffin.
The pull rate is brutal: only 8% when fusing four Strawberry Elephants with Fuse Luck active. That's the highest-probability known combo for it, so there's no shortcut. You need a stockpile of high-tier brainrots and patience. If you're farming toward Dragon Aquanini, check out the how to steal all brainrots guide to build up your inventory faster before committing to fuses.
Is Coco and Mango worth targeting instead?
For players who can't reliably land Dragon Aquanini, Coco and Mango is the smart fallback. At $33.5M per second it's a strong earner, and the 16% pull rate from four Strawberry Elephants makes it meaningfully more achievable than the 8% Dragon Aquanini slot. The design is a tropical fruit duo (a mango and a coconut, both with expressive faces) that fits the summer theme cleanly.
The same four-Strawberry-Elephant combo that targets Dragon Aquanini also has a 46% shot at Capitano Gullini and a 33% shot at Ombrello Topolino, so every attempt at the top-end pool gives you multiple useful outcomes rather than a total loss.
The Summer Fuse is a limited-time machine. Based on how previous seasonal machines have operated, it will be removed from the game after the event ends. If any of these brainrots are on your list, don't sit on your stockpile.
Tips for getting the most out of Summer Fuse
What inputs should you use?
The quality of your output is directly tied to what you put in. Mixing high-rarity and low-rarity brainrots dilutes the pool and pulls results toward the lower end. If you're going for Secrets, use only Secret-tier inputs. If you're farming Mythics or Brainrot Gods, match your inputs to that tier range.
For players still building their collection and looking to unlock rarer units through other methods, the secret brainrots unlock guide covers strategies that pair well with the Summer Fuse approach.
How do you protect your fuse result?
The 90-minute wait for a Secret brainrot is a significant time investment. Before that timer runs out:
- Place traps along the path between the Summer Fuse Machine and your base
- Watch for players camping near the machine who are waiting for fuses to finish
- Private servers remove the theft risk entirely and are the safest option for high-value pulls
Does mutation stacking actually work?
Yes. Running four identically mutated brainrots as inputs stacks the inheritance chance above the base 10-20% range. A mutated Dragon Aquanini or Coco and Mango would carry significantly higher trade value, so this is worth planning around if you have the mutated inventory to support it.
OG Meowl and other rare targets
If you're also grinding for rare units outside the Summer Fuse pool, the OG Meowl unlock guide covers a completely separate acquisition path worth reading alongside this one.
The Summer Fuse sits in a strong spot as seasonal content goes. The Common-to-Legendary pool reuses familiar units, which means lower-rarity fuses aren't a total waste if you're still filling out your roster. The real action is in the Mythic-and-above tier, where all 10 new summer-exclusive characters live. Dragon Aquanini is the target, Coco and Mango is the safety net, and the 90-minute fuse window is your biggest vulnerability. Plan your traps, stack your mutations, and don't wait too long. For more strategies across the full game, the Steal a Brainrot guides collection has everything you need to stay ahead.