Gon is in his adult form, Natsu has atlas flames, and Allen can use his exorcist blade.
@Stingerrain: The Big Daddies can casually walk 6 miles under the ocean and that would take some amazing strength and durability. As for Liberty Prime, he has a near limitless amount of explosives that are much more powerful than the average mini-nuke and throws them like footballs. Also he has a bunch of laser weapons (most notably the twin lasers) and was able to walk through energy barriers like nothing. It took an orbital missile strike to actually destroy his body.