I'm Garrett and I'm a community manager here at Fandom. The Gaming community team at Fandom would like to reward users like you who have really made extraordinary contributions to our platform. To do that I'll need to email you directly to talk details. Is it ok with you if we contact you at the email address you have listed on file for your account?
Although Watermelon Uragaan doesn't have its own page as of yet, it is a legitimate Variant. As for B.O.W. Uragaan and Spoiled Uragaan, I'm pretty sure they're just jokes, because there's no real information confirming that they're legitimate.