@The:
That's not entirely true, you see, the one Yonko we've seen in action (Whitebeard) has powers that are on a planetary scale, similar to Jirou knocking the entire planet. Whitebeard's power was literally creating earthquakes and tsunamis on the other side of the planet when he was spamming them at Marineford; Whitebeard literally had the power that could destroy the (One Piece) world. One Piece's world is also larger than our own, however, I think Toriko's is still larger than One Piece's world.
Basically what I'm saying is, I'm almost 100% certain that at least Whitebeard and Kaido could hold their own in the Gourmet World, especially Whitebeard. (Heck… Kuma could probably hold his own too, since he can repel anything and everything miles upon miles; what's stopping him from repelling that Cthulhu Elephant into space, and suffocating it? lol)
P.S. - These are the conversations I LIVE FOR. But...we should probably stop. lol I don't want to get in trouble, and this is quite off-topic.
Planetary scale? You kidding me? When has he shown anything even remotely close to planetary? Lets review what killed Whitebeard, shall we? 267 slash and stab wounds, 152 gunshots, 1 finger laser from Kizaru, 2 magma fists and 30 some odd cannon ball shots. That's all it took to bring down the champion of One Piece. Now lets compare that to what the Mount Turtle (a mid 150 CLVL beast) tanked.
http://www.mangahere.com/manga/toriko/c196/4.html
http://www.mangahere.com/manga/toriko/c196/6.html
To put that in perspective; the Mount Turtle withstood enough fire power to wasteland all of Europe(10,000 KM) and didn't even flinch.
!
And the beasts we're seeing now make the Mount Turtle look like a cute puppy by comparison. Whitebeard would get raped in the Gourmet World.
Also, you might want to look up a little something called the "No Limits Fallacy" before you assert so assuredly that Kuma is sending that behomoth into space. -_- http://www.stardestroyer.net/mrwong/wiki/index.php/No_limits_fallacy
@Nekketsu:
Many characters in One Piece could hold their own in Gourmet World. For instance Kuzan could freeze any creature that approached him.
If people like Doflamingo can break out of Kuzan's ice then it's safe to say that anything level 150+ isn't staying frozen for very long.