Innocent Zero's final attack (that wouldn't disappear even after he was defeated) was powerful enough to destroy/erase the gigantic Pangaea esque continent the series takes place in, so Mash moved the entire continent out of the way by pushing it while swimming on some Patrick Star "let's take Bikini Bottom and push it somewhere else" shit

. Though even with the attack missing it still caused a massive tsunami that would've wiped out the continent anyway if it weren't for Mash taking Innocent Zero's wand and using it like a fan to make a wind current that obliterated the tsunami.