The beauty of the Marvel Multiverse is that there is an infinite number of alternate realities, many of which contain a version of someone like the Incredible Hulk. Even in the standard Marvel Universe of Earth-616, there is more than one Hulk running around, but the Multiverse is home to some of the strangest around.
The Multiverse contains some of the weirdest, strongest, most ridiculous, and craziest versions of the Hulk around, but not every gigantic green rage monster is one who could top a list about the most insane versions out there. There are some freaky Hulks that have shown up in the comics over the years, and odds are, they're weirder than you think.
Whether it's a futuristic version of the Hulk or a version of the Hulk that stems from someone other than Dr. Bruce Banner, there are plenty to choose from in finding the one considered to be the craziest one out there.
These ten versions of the Incredible Hulk may not be the strongest, they may not be the smartest, but they are certainly ten of the most insane alternate versions of the jade giant to have graced the pages of Marvel Comics over the years.
Back in the 1990s, Marvel and DC decided to work with one another to see what their characters would be like if their most popular properties were merged. The result was an imprint of both companies called Amalgam Comics, and for the Marvel Multiverse, it became Earth-9602.
In the case of the Hulk, the merging involved Bruce Banner and Solomon Grundy, so Hulk became Skulk.
Just as it happened in the Marvel Universe, Dr. Bruce Banner was experimenting with radiation, but when it all went horribly wrong, he didn't transform into a green rage monster, he became fused wit the elemental entity known as Solomon Grundy.
He could revert to his Dr. Banner form, but only through the use of magic, and with the help of Dr. Strangefate (an amalgam of Dr. Strange and Dr. Fate). He agreed to work for the good Doctor in turn for keeping him from becoming a grey-skinned monster.
Unlike the normal Hulk of Earth-616, Banner can transform himself into Skulk at will. He can't go back the other way without some mystical assistance, so it's not all it's cracked up to be. He also has the same powers as the Hulk, and Solomon Grundy combined, so he's more powerful than your run-of-the-mill Marvel Hulk.