A core mechanic of Bugsnax is feeding the Grumpuses. Once you've caught a Bugsnak, you can offer it to a Grumpus. Each Bugsnak will transform a specific body part of the Grumpus it's fed to. This is often required to progress quests or simply to see the hilarious transformations. Experiment with different Bugsnax to see all the possible changes and fulfill their unique cravings.
