In Super Smash Bros. Brawl
The Fish is a hazard on the Summit. It will pop out of the sea to eat any character that stays in the water at the bottom of the stage for too long. The fish will only appear when there is water around the base of the stage, not when the stage is at the top of the mountain, or falling, or rising. If the fish swallows a character,it will dive underwater again,meaning that character will be carried through the lower blast line and KOed. The fish's tail is also capable of hurting characters, dealing 15% damage and giving significant vertical knockback. The fish can eat any number of characters in a single appearance, but it will always follow a set arc and will go after whichever character has been in the water the longest. If swallowed, there is no way to escape, but there is a small window of time in which a character can get out of the fish's path.Otherwise,the character is certain to lose a stock.
In Super Smash Bros. 3DS/Wii U
The Fish returns as a stage hazard for a completely different stage, Balloon Fight, which happens to be from its home universe. It is very different from the Summit version, as most notably it now appears on its 8-bit form, in keeping with the Balloon Fight stage graphics. It hides in the water in the center of the stage, much like it did in the water at Summit, and will attack any players who touch the water and attempt to drag them down. However, unlike its Summit version, it is much easier to escape from the fish.
- The Fish is the only hazard to appear in a stage from a different universe
- The Fish is also the only hazard to appear in stages from two different universes.