Gronkats and Olbaps were animals kept as pets by the Space Pirates on Tallon IV. They were all force-terminated after they suffered negative effects from Phazon Fever. Since these creatures have not been encountered, nothing else is known about them. The only mention of them in the entire Metroid series is in a scan in the Central Dynamo room in Metroid Prime. Unspecified Pirate pets were referenced in Another Side Story.
Although the name of the creature, Olbap, is mentioned plurally, the name of this creature, if spelled backwards, is "Pablo."
"The keeping of pets has been suspended until further notice. Domestic beasts have been deemed highly susceptible to Phazon madness, and are thereby 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."