Yes in lore there are literally pokemon who could just destroy the entire planet.
Its such a boring question, the only response is "but you dont understand how much a billion is"
when is reality even if you exclude the god pokemon there are pokemon like coalossal
"Coalossal has a peaceful disposition. However, it becomes enraged if the coal mines it lives in are vandalized, incinerating those who invade its territory with flames from its body as hot as 2,700 degrees Fahrenheit (1,500 degrees Celsius)"
twice the heat of a active vulcano. Like bro this thing can just walk around and kill every lion itself.