Although they appear together, Shoe and Karn each inhabits a single platform and are only a threat at their respective positions so players only need to fight one while avoiding attacks from the other (preferably starting with Karn at the bottom, first). Shoe and Karn from the first game while they're Dual Bosses that attacks together, individually they have pathetic health (for a boss), especially if the player have a Slug at their service.Breather Boss: Some of the mid-level bosses, encountered halfway through the game, are actually considerably easier, especially compared to some prior bosses.He does make an appearance as an April Fools' Day unit in Attack, over a decade after the fact.Was supposed to be subverted in Metal Slug 4, where fishpeople where planned to be the main enemies of the game or enemies exclusive to an underwater city mission note The former idea based on this French video while the latter is based on an interview in Metal Slug Anthology, but went under due to the staff losing interest in the idea and by SNK's bankruptcy at the time. Big-Lipped Alligator Moment: The sinking gun hitting the fishman in the end of Metal Slug 3.Not only does it look incredibly detailed in-game, with all its visible moving parts in place, the concepts are also a sight to behold. The design of the machinery also deserve mention.

Metal slug vehicle sprites