Mayfee
Once upon a time there was a precocious little organism called Mayfee, who was originally intended to fill the position "pokemon number sixteen-thousand five-hundred and eighty-two" but was unfortunately scrapped in order to accommodate for more welcome newcomers such as Spoink, Metagross, and of course the lovable Wurmple — and though the Mayfee creature was, for a time, buried like a dirty sock in the laundry basket of anonymity, sadistic character designers working on a extraordinarily obscure game known to be rumored to be whispered in anxious liaisons as "Baten Kaitos" eventually found the thing and were determined to play an awfully nasty joke on their colleagues (though they were merciful enough to write into the storyline that Mayfee's parents died incidentally sudden deaths upon the very stroke of midnight in which Mayfee was born, to spare innocent non-playable characters the hellish work of raising it), and thus Mayfee traveled to the Baten Kaitos world and began to thrive there, passing its time terrifying random passersby with high-pitched mating calls which have been interpreted by some as snippets of plot-related Celestial Tree Guardian conversation — though in all truthfulness they were actually the Mayfee beast's attempts to revive the pokemon tradition of screaming incomprehensible gibberish when feeling hot and bothered.
Oh, and this marked the beginning of the regeneration of the world.