This launch-week tier list ranks every catchable Brainrot by a combination of rarity, Tong coin passive income, route clear utility, and Player XP yield from registering new species in the Brain Index. Rankings will be revised as the community verifies actual passive income numbers post-launch.
Epics (Chicleteira Bicicleteira, Spijuniro Golubiro, Orangutini Ananaini, Ecco Cavallo Virtuoso, Bombombini Gussini in the Grass Zone; Lirili Larila and Strawberrelli Flamingelli in the Ice Zone) sit at S tier by default. They are the most expensive to chase in box investment but the highest value party slots.
Rares are A/S tier and the right priority for party building once you unlock the Gold Box at Level 6. Uncommons are A/B and excellent early keepers. Commons are B/C and best treated as Index fillers or sell fodder once you have Uncommon replacements.
Meme-name Brainrots like TungTungTung Sahur and Ballerina Cappuccina may jump tiers once passive income numbers are verified post-launch. Bookmark this page and check back after each Index milestone.