Tens of thousands of Pokemon Go fans descended on a Taiwan park Thursday hoping to catch a rare “Heracross” and other elusive virtual creatures from the popular game.

The four-day Pokemon Go Safari Zone in New Taipei City is expected to attract up to half a million fans of the cute fighting creatures.

Pokemon Go has sparked a global frenzy since its launch in 2016 as users of the gaming app hunt for virtual cartoon characters overlaid on real-world locations using augmented reality technology.