It is not in Mount Coronet, but in a temple in the heart of the Crown Tundra, where Regigigas at last acknowledged the coming of the digital age. A DDOS attack from a place so remote that few thought it even had internet, Regieleki announced its existence with a bang; the surge disabled long-distance pokemon trading for months.
Regieleki is a thunder ball of a digital monster, an entity which speeds around the internet and the offline world at a pace which makes even Porygon look as if it is standing still. The electron automaton creates power surges as it moves, and some guidebooks have actually referred to it as a computer virus, not a pokemon at all; curiously, others describe it as 'data'. But a close look at what entities it has targeted suggests that this newest member of the quintet has not abandoned the group's traditional role as guardian; after all, Macro Cosmos' reckless investment in resource extraction represents the biggest environmental threat to the pokemon and people of the Crown Tundra, and to the structural integrity of Regigigas' temple. In far-off Sinnoh, Team Galactic's efforts to seize Mount Coronet were similarly slowed down mightily by mysterious computer trouble, while Hoenn's warring cults have learned the hard way that, whatever they do with land and sea, they must not touch the ruins.
Some have interpreted its movement through wires and the internet, along with a shape that lightning is known to take, as evidence that Regieleki lacks a physical form. Macro Cosmos' ill-fated Tundra Expedition, however, proves otherwise; there is no other way to explain the few surviving witnesses' accounts of turbines positioned like wings around a yellow ball and lighting up the midnight sky.