Jirass vs Jack Sparrow
Suggested by Destroyer Jirass is a powerful Kaiju. While he may not be one of the most well known ones out there, the guy left an impression. Jack Sparrow may have immortality to a degree, it doesn’t really help here. I’ve always been of the opinion that immortality can be more of a curse than a blessing since you’ll end up getting stomped into the dirt for all eternity if you live in a realm where there’s a fighter more powerful than you. That’s just how it goes sometimes and that’s what would happen here as Jirass will stomp Jack until he stays down. Jirass wins.