Thump.
Since there were no airwaves on Mars, Satoshi and the World Eater landed in silence despite the impact they caused.
A couple of roll-overs later, the two of them had a stare-down, not wanting to dust themselves off despite the obvious dirt on their bodies.
"What a genius plan, I'll give you plus points for that." World Eater slowly clapped his hands, but before he could finish his statement, Satoshi disappeared and instantly reappeared before delivering a punch that landed straight into his solar plexus.
However, the World Eater fully expected the attack... and even then, he didn't dodge. To him, the attack just lacked the firepower and he was fairly certain that he'd walk out of it unscathed. '
In the end, the World Eater was right on his estimate. Despite the crazy firepower that Satoshi had after merging both with Nailgun and Sera, the attack just landed, not dealing a single digit of damage on the World Eater.