What is the rarest Brainrot?

Currently, the OG rarity is the highest, surpassing Secret. Examples typically include event-specific Brainrots.

How do I get Brainrots?

You can purchase them from the conveyor or steal them from other players' bases if they are unlocked.

What is Steal a Brainrot?

Steal a Brainrot is a thrilling Roblox game by BRAZILIAN SPYDER where you collect brainrots, build wealth, and compete on the leaderboard.

How does the fusion system work?

You can use the Fuse Machine to combine two brainrots and create new, rarer brainrots. Special fusion machines like Santa's Fuse and Witch Fuse offer unique combinations.

Brunito Marsito

Secret

RUNWAY

Base Cost

$750.0M

Income per Second

$3.5M

Efficiency

0.47%

Event

Bruno Mars Event

Brunito Marsito is a Secret-tier Brainrot created exclusively for the in-game concert of pop singer and songwriter Bruno Mars. Brunito Marsito represents extreme admin-level rarity, musical meme culture, and celebration-driven Brainrot chaos, making Brunito Marsito one of the rarest and most talked-about Brainrots ever spawned in Steal a Brainrot.

Secret brainrot generating $3.5M/second

Spawned only once by Sammy during a special Admin Abuse event celebrating the Brunito Marsito in-game concert appearance.

How to get it Calculate income Related routes

Identity & Availability

Quick Answers

What is Brunito Marsito?

Brunito Marsito is a Secret brainrot in Steal a Brainrot through regular brainrot routes. It generates $3.5M/s and has a listed base cost of $750M.

How do you get Brunito Marsito?

Current availability for Brunito Marsito: Spawned only once by Sammy during a special Admin Abuse event celebrating the Brunito Marsito in-game concert appearance.

When was Brunito Marsito added to Steal a Brainrot?

Brunito Marsito has a recorded game-added date of January 17, 2026.

Release Status

Released

Primary Route

Runway

Event Source

Bruno Mars Event

Visual Structure

Standalone

Added to Game

January 17, 2026

Current Availability

Spawned only once by Sammy during a special Admin Abuse event celebrating the Brunito Marsito in-game concert appearance.

How to Obtain

RUNWAY

Available for direct purchase from the conveyor.

Purchase

Brunito Marsito can only be obtained a single time when Sammy manually spawns Brunito Marsito during the bruno-mars-event held for the in-game Bruno Mars concert on January 17, 2026.

Steal

Steal from heavily defended bases; requires advanced speed boosts, strategic timing, and high-tier defensive items.

Pro Tips

To obtain Brunito Marsito, players must be online during the bruno-mars-event and react instantly when Brunito Marsito is spawned, as this Brainrot will only appear once.

Mutation Income Calculator

Select Mutation

Time Period

Income with Default mutation

12.6B/h

Base: $12.6B/h → +0%

View all mutations at hourly rates

Mutation	Mult	Income
Default	1x	$12.6B
Gold	1.25x	$15.7B
Diamond	1.5x	$18.9B
Rainbow	10x	$126.0B
Bloodrot	2x	$25.2B
Celestial	4x	$50.4B
Candy	4x	$50.4B
Lava	6x	$75.6B
Galaxy	6x	$75.6B
YinYang	7.5x	$94.5B
Radioactive	8.5x	$107.1B
Cursed	9x	$113.4B
Divine	10x	$126.0B
Cyber	11x	$138.6B
Phantom	12x	$151.2B

Release Status

Released

None; confirmed as a published Secret Brainrot character by developers, introduced in January 2026. Brunito Marsito is known for being a one-time admin-spawned Brainrot.