Steal a Brainrot Summer Index (2026) — Full Brainrot List, Values, and the Fastest Way to Unlock Summer Base

If you’ve logged into Steal a Brainrot lately, you’ve probably noticed a beach-themed tracker sitting in your menu, counting down how many summer-exclusive characters you own. That’s the Summer Index, and it’s quietly become one of the most talked-about grinds in the game right now. Unlike a normal collection list, this one comes with a real payoff attached: hit the right number, and you walk away with the Summer Base, a cosmetic skin players have been chasing since the tracker went live.

The tricky part is that nobody wants to burn hours farming brainrots they don’t actually need. So below, we’re breaking down the full list, what each entry is worth, and — more importantly — which ones you can afford to skip entirely.

What Is the Summer Index?

The Summer Index is a limited-time collection challenge that arrived with the game’s Summer Update on June 13, 2026. It tracks 20 exclusive, summer-themed brainrots in a dedicated in-game tracker, separate from your regular collection. You don’t need to own all 20 to get rewarded — collecting 18 out of the 20 is enough to unlock the Summer Base.

One detail that trips people up: the index only cares whether you’ve owned a brainrot, not how many copies or which mutation it rolled. A basic version and a rare Rainbow version of the same brainrot both count as exactly one tick toward your total. That means duplicate hunting is wasted effort here — your energy is better spent chasing names you’re still missing rather than stacking extras of ones you’ve already indexed.

It’s also worth flagging that a second wave of content, the Summer Update Part 2 (June 20, 2026), added a handful of extra summer brainrots to the game alongside features like Trade Plaza and live exist counts. Whether those newer additions formally count toward the original 20-slot Index or exist as a separate bonus pool hasn’t been fully nailed down across sources yet, so treat the core 20 below as the confirmed target.

All 20 Summer Index Brainrots

Here’s the full, cross-checked list of brainrots that make up the Summer Index, along with confirmed cost and income values pulled directly from in-game data and the community wiki. A handful of entries are Lucky Block exclusives, meaning they don’t have a direct purchase price — they only drop randomly, so we’ve noted the drop rate instead of a cost for those.

At Glance	Brainrot	Rarity	Cost	Income	How to Get It
	Cocoteddy	Mythic	$4.7M	$15K/s	Summer Fuse
	Bucketoro	Mythic	$5.7M	$18.2K/s	Summer Fuse
	Sundrilla Sundae	Brainrot God	$31M	$180K/s	Summer Fuse
	Lemonita Splashita	Brainrot God	$48M	$280K/s	Summer Fuse
	Flippo Marino	Brainrot God	$75.5M	$316K/s	Summer Fuse
	Tortuginni Sandcastlini	Brainrot God	Lucky Block only (32.65% odds)	$317.5K/s	Octo Lucky Block
	Bombardiro Vaccariro	Secret	$250M	$1M/s	Summer Fuse
	Rocketini Frostini	Secret	Code-exclusive	$3M/s	Limited Code
	Ombrello Topolino	Secret	$1.2B	$6.5M/s	Summer Fuse
	Sushi Inu	Secret	$1.3B	$8M/s	Octo Lucky Block (10% odds)
	Girafini Raftini	Secret	Lucky Block only (5% odds)	$18M/s	Octo Lucky Block
	Frullato Framingo	Secret	$3B	$20M/s	Limited Code
	Capitano Gullini	Secret	$2.7B	$22M/s	Summer Fuse
	Los Fruits	Secret	$3B	$23M/s	Summer Fuse
	Sand Sand Sand	Secret	Lucky Block only (1% odds)	$30M/s	Octo Lucky Block
	Coco and Mango	Secret	$4.5B	$33.5M/s	Summer Fuse
	Bearito Cabinito	Secret	Lucky Block only (0.25% odds)	$72.5M/s	Octo Lucky Block
	Venuspino	Secret	$150B	$175M/s	Summer Fuse
	Kraken	Secret	Lucky Block only (0.1% odds)	$200M/s	Octo Lucky Block
	Dragon Aquanini	Secret	$375B	$375M/s	Summer Fuse

The pattern here is clear: this index isn’t just a cosmetic checklist. Several entries, especially Venuspino, Coco and Mango, Kraken, and Dragon Aquanini, are genuinely strong earners in their own right, so completing the index doubles as a legitimate upgrade to your base’s income rather than just a collection badge.

How to Actually Get These Brainrots

There are three practical routes into the Summer Index, and serious players tend to lean on all three rather than relying on just one.

Summer Fuse Machine – This is the main engine behind the whole event. You’ll find it sitting near the Shop in the middle of the map. Load four of your own brainrots into it, press E to preview what the fusion might produce, and hit Fuse. Results lean toward the “average rarity” of whatever you feed it, with a modest chance of stepping up a tier.

Octo Lucky Blocks – These give you an alternate shot at pulling summer entries without relying purely on fusion RNG. Worth running in parallel rather than treating the Fuse Machine as your only option.

RNG Machine – Added when the old Trade Machine was phased out, this newer machine offers yet another independent path to fill index slots, so it’s worth checking regularly.

Trading – Once your index sits around 13 or higher out of 18, trading tends to close the gap faster than grinding. At that stage, you’re usually missing a handful of specific rare names rather than a broad spread, and another player is often willing to swap for something you no longer need.

Redemption Codes – A couple of entries, namely Rocketini Frostini and Frullato Framingo, were originally distributed through a one-time code rather than any in-game machine. If that code has already run out of stock by the time you’re reading this, trading becomes your only realistic option for these two.

Which 2 Brainrots You Can Safely Skip

Here’s the part most guides completely miss: since the Summer Base only requires 18 out of 20, you have room to drop the two hardest entries entirely without losing the reward — and the “hardest” ones aren’t necessarily the ones you’d expect.

Looking at how each brainrot is actually sourced, two names stand out as genuinely risky to chase: Rocketini Frostini and Frullato Framingo. Both of these weren’t put into the Summer Fuse or Lucky Block pools at all — they were handed out through a limited-stock redemption code (SUMMERUPD3) back when Update 53 first launched. Once that code’s stock runs out, there’s no confirmed alternate farming route for either one, which means players who missed the code window may only be able to get these two through trading, not grinding.

Compare that to the two toughest Lucky Block pulls, Kraken (0.1% odds) and Bearito Cabinito (0.25% odds). These are brutal drop rates, no question, but they’re still live, farmable odds through the Octo Lucky Block — meaning with enough time and blocks, you can eventually pull them yourself.

So if you’re weighing which two to leave out of your final 18, prioritize skipping Rocketini Frostini and Frullato Framingo first, since grinding for them without the original code is a dead end for most players. Save your Lucky Block attempts for Kraken and Bearito Cabinito instead — the odds are rough, but at least the door is still open.

A Realistic Farming Route (3 Phases)

If you’re starting from zero, here’s a rough approach that keeps your grinding efficient rather than scattershot:

1. Early slots first — Focus on whatever comes easiest through normal fusing and Lucky Block pulls. These lower-rarity entries fill in quickly with minimal investment.
2. Mythic and Brainrot God tier — Once the easy slots are done, escalate your fuse inputs to target names like Cocoteddy, Bucketoro, Sundrilla Sundae, Lemonita Splashita, and Flippo Marino. Expect each attempt in this range to take around 30 minutes, so running a few cycles in parallel while you do other things in-game is a solid use of downtime.
3. Secret-tier, selectively — This is where fuse attempts stretch closer to 90 minutes each. Rather than grinding blindly, aim for the Secret entries that aren’t Dragon Aquanini or Coco and Mango, and lean on trading once you’re within a few slots of 18.

Is the Summer Index Still Available?

As of early July 2026, the event is still active and the Summer Base remains obtainable. That said, developers haven’t announced a firm end date, and limited-time indexes in this game have a habit of closing without much warning once the next seasonal update rolls in. If you’ve been putting this off, it’s worth prioritizing now rather than assuming there’s unlimited time left.

Frequently Asked Questions