Rot Candy

Rot Candy is a new entity being added from launch-window gameplay: it's an XP consumable priced at 50 Robux each, fed directly to a chosen brainrot to grant it a documented boost of roughly 240 XP. Multiple independent creators confirm the 240 XP figure; the 50-Robux price is corroborated by a smaller number of sources, so treat the exact price as reasonably but not fully confirmed.

It isn't purely a Robux purchase - Rot Candy (also seen captioned as "rock candy," likely the same item) has also turned up as a random reward from open-world chests, giving free-to-play players an occasional way to pick one up without spending Robux.

The natural place to spend it is on a brainrot you're actively leveling for a Trainer fight or the next zone gate, since it's a direct XP injection rather than a passive multiplier.

A separate launch-window beginner's guide independently confirms the mechanic and the exact 240 XP figure, describing a dedicated EXP Machine near the starter area where candy is bought with Robux and fed straight to a chosen brainrot - the strongest corroboration yet for both the item and its effect.