Infinity Box

The Infinity Box is a new entity being added from launch-window gameplay: it's a premium catching item sold for 380 Robux that guarantees a capture - 100% catch chance regardless of the target's level or remaining HP. Multiple independent creators confirm both the exact price and the guaranteed-catch function, including footage of it being bought mid-battle to secure a tough level-26 boss-tier catch that normal boxes were putting at only a 1-2% chance.

It's offered as a button directly on the catch screen (rather than only from the Rot Center shop shelf), which makes it the go-to answer when a player is staring down a rare or boss-tier brainrot and a Rot Box/Silver Box/Gold Box isn't landing. No level requirement is documented - it's purchasable from the very first catch screen a new player sees.

Because it's a real-money (Robux) purchase with no coin-price alternative documented, launch-window guides frame it as a rare-catch insurance policy rather than a routine tool - most players are shown reaching for it only when a specific highly-desirable capture (a boss, a rare spawn) is on the line.