Default
Steal a Brainrot mutation × 1.
Default — In-Depth Analysis
Among all the mutations a brainrot can carry, Default is the starting point — it means no mutation has been applied, leaving the brainrot at its baseline x1 income multiplier. Rather than being a flaw, Default is simply the clean slate that the Mutation Spinner and Gold Lucky Blocks are designed to improve upon. Think of this page as the reference floor: every other mutation is measured against what a Default brainrot earns.
Mutations enter the picture in two ways. You can spin the Mutation Spinner on any brainrot you own, rolling for a multiplier that recolors the character and boosts its passive cash output. Gold Lucky Blocks work the same way, dropping a random mutation when opened. Higher-multiplier mutations are considerably rarer rolls, so leaving a brainrot at Default is common — especially early in a grind.
From a practical standpoint, any mutation you land stacks on top of a brainrot's existing trait multiplier, compounding the income boost and making the brainrot a premium target for thieves. Protect upgraded brainrots carefully. A Default brainrot is the easiest to replace if stolen, but it also signals a clear upgrade path — making it worth spinning on as soon as resources allow.
Popular brainrots to apply this mutation to
Frequently Asked Questions
▸What is the Default mutation multiplier?
The Default mutation multiplies a brainrot's base income by ×1.
▸How do you get the Default mutation?
According to the wiki, Gold, Diamond and Rainbow can appear on brainrots from the Red Carpet; limited mutations (such as Default, if it is one of them) have a mild chance to be applied during their own event and are otherwise unobtainable without Admin Abuse.