Gronkats are among the domesticated creatures kept as pets by Space Pirates. Because animals were deemed especially susceptible to Phazon Madness, the keeping of pets by Pirates on Tallon IV was suspended. Gronkats and Olbaps were the two species mentioned by name to be exterminated immediately under threat of loss of pay for a cycle and reduced rations.
- "The keeping of pets has ben suspended until further notice. Domestic beasts have been deemed highly susceptible to Phazon Madness, and are therefore a hazard to personnel. All Gronkats and Olbaps must be disposed of immediately. Failure to comply will result in the loss of pay for a cycle and reduced rations." —Scan Data (Metroid Prime)