Catch and Feed a Brainrot Guide

Mutations and variants are the two systems that multiply your Brainrot's income in Catch and Feed a Brainrot. They work differently and understanding the distinction is the first step to maximizing your earnings. Mutations are purchased from the Potions Shop and can be stacked — meaning you can apply multiple mutations to the same Brainrot and their multipliers add together. Variants are random rare forms that your Brainrot can take, but only one variant can be active at a time. The key difference: mutations stack additively, variants multiply the total. This is where the real money is.

There are currently eight Brainrot mutations in the game. Vampire sits at the top with a x12 multiplier — reportedly added in a recent update and only confirmed by one source so far. Rainbow (Mythical, x10) and Crystal (Legendary, x9) are your next best picks. Glitch (Legendary, x8) costs $246.7QT but delivers solid returns. Mid-tier options include Sparkle (Epic, x4) and Bloodrot (Epic, x3.5). Budget players start with Lightning (Rare, x3 at $67.2T) and Wet (Uncommon, x2 at $4.5B). All mutations are bought from the Potions Shop, which restocks on a timer — check back regularly because the good ones sell out.

Variants are simpler. Four exist: Shiny (x5), Void (x4), Diamond (x3), and Gold (x2). These are random rare forms your Brainrot can take. You can only have one active variant at a time, so Shiny is always the goal. Unlike mutations, you can't buy variants — they appear randomly when your Brainrot evolves or through specific gameplay triggers.

Here's where it gets interesting: the multiplier formula. Your total multiplier is calculated as Variant × (Mutation1 + Mutation2 + Mutation3 + ...). Mutations are added together first because they stack, then the variant multiplies the sum. Example: a Void variant (x4) with Lightning (x3) and Glitch (x8) gives you 4 × (3 + 8) = 44x total multiplier. That's why stacking mutations matters so much — each new mutation you add gets amplified by your variant.

For the absolute best combo, you want Shiny variant (x5) with every mutation stacked. If you could stack all eight mutations: Vampire (12) + Rainbow (10) + Crystal (9) + Glitch (8) + Sparkle (4) + Bloodrot (3.5) + Lightning (3) + Wet (2) = 51.5 total mutation sum. Multiply by Shiny's x5 and you get x257.5. Realistically, most players focus on the top 3-4 mutations first since the cheaper ones barely move the needle once you have Vampire and Rainbow running.

Fruit mutations are a separate system that affects experience points, not income. When you grow fruit on your farm, fruit pump, or potion-infused plant farm, the fruit can mutate into better versions. Letting plants grow longer increases the chance of a better mutation. The progression goes: Chill (~322.0 QT XP), Gold (≥18.0 ST XP), Diamond (~441.7 ST XP), Shiny (≥994.4 ST XP), and Void (≥90 OT XP). Void fruit mutations give the most XP by far. The current best plant is Durian, which grows passively — just let it sit and collect. Feed mutated fruit to your Brainrots to level them up faster.

To get mutations, head to the Potions Shop in-game. The shop stocks different mutations at different times, and restocking takes a while. When you see a high-tier mutation available, buy it immediately — waiting means someone else grabs it or the shop rotates. Mutations are permanent once applied, so there's no risk in buying early. Stack them as you can afford them, prioritizing the highest multiplier ones first. For a full ranking of which mutations and Brainrots give the best return, check our tier list. For earnings breakdowns and value comparisons, see the value list.