Planet Zebes

Planet Zebes (惑星ゼーベス, Planet Zebes) serves as the lone Metroid installment stage for Super Smash Bros. and makes a comeback into Super Smash Bros. Universe.

Stage Layout
Planet Zebes consists of a rough, jagged base, three main platforms (two of which are sloped at an angle), and one smaller platform ascending and descending at the far right of the stage. Hazardous acid rises from below, submerging most of the base and occasionally two of the three platforms, though it never rises high enough to reach the topmost platform.

Touching the acid results in damage and major vertical knockback, and can KO if the player's damage meter is high enough. Contradictorily, it can also be used strategically as a means of salvage if the acid rises high enough. Whereas falling off the stage on any other level will result in an instant KO, the acid will deal damage to a character but send them flying skyward, allowing them to reuse their recovery or simply fall back onto the stage. Obtaining a Starman (or any form of invincibility) grants invulnerability to the acid, allowing the player to walk through it. However if while invincible the player falls off the stage and through the acid, he or she will self-destruct as they are immune to its burn effect.

in the original Super Smash Bros, the acid had no effect on items. It wouldn’t break open containers, detonate motion sensor bombs, or set off green or red shells. However in Universe, it would have effect on items, except it won’t set off green or red shells. Wavers and Ridley can also occasionally be spotted flying in the background, however, Ridley will not show up in the background if he is present in the match.