Thanos is out on a search for the Infinity Stones, as he searched the Earth for them. He then suddenly finds himself in the land of Goiky, thinking one of the stones should be here. As he searched, the contestants looked right at him, confused.
Thanos: The stones have to be here somewhere...
Eventually, Thanos then knew this was getting hard to look for them, so in desparation, he pulls out the Incomplete Infinity Gauntlet, which only had the Power Stone and Space Stone in there. He then fired a massive blast from the Power Stone which all of a sudden began to destroy all of Goiky, the contestants screaming as they tried to run away from the blast, but were caught right in it and killed as they screamed.
Goiky was now in ruin. Debris everywhere, dead bodies, fire, you name it. Suddenly, a voice spoke out.
Thanos was surprised that someone may have survived his attack, so he looked, and it was...
Thanos: ...a living number? Hmph. Your world will be destroyed when I get the Infinity Stones!
Four: Youre REALLY committed to this, huh?
Desparate, Four fires a Zappy at Thanos, who just grabs the laser with the Space Stone, and threw it upwards, making the living number get surprised.
Thanos: You shouldve gone for the head. You are nothing but a pity. You are just as weak as the Avengers!
Four: You are going to get ELIMINATED! Now...
Four began to emit more energy from his hand.
Four: ...ITS TIME!
Thanos: You are only going to delay your fate.
Both got into their fighting stances. Boy, shit is about to go down... lets just hope everything is safe.
Thanos will has access to the Incomplete Infinity Gauntlet containing the Power Stone and Space Stone only as well as the Double-Bladed Helicopter Sword for this fight. Four, on the other hand, has access to his Anti-Flying Button. Speed is equalized and both start 10 meters away from each other. Fight starts in Goiky, giving Four the location advantage, but the location may change overtime.
We never seen Four ever use it on someone who doesnt fly, but I am assuming that it works on everyone. That isnt really the official name, as it doesnt even have one to begin with. Its just a name everyone likes to call it, so it may work on other people.
As for if it can obliterate Thanos through Matter Manipulation, it is able to seemingly reduce Lightning and Black Hole into nothingness (which is like a Durability Negation of some sort), so it can be assumed that it does indeed obliterate him.