in certain cases, such as role-playing video games, palette swaps are used to signify a character's status. prominent examples of this are seen in "final fantasy", in which a player character afflicted with the "poison" status effect will appear purple. in other games, such as "dragon quest ix" or "dark cloud 2", palette swaps are used for mobs to distinguish higher level enemies. by contrast, the main characters of "breath of fire ii" occasionally swap their palette colors to indicate an increase in their respective statistics. in "mario bros.", "wrecking crew", "super mario bros.", "super mario bros. 3", "super mario world", "super mario bros. deluxe" (except in the "super mario all-stars" versions of the latter three, as well the "super mario advance" series), "mario is missing!" (nes and snes versions), "hotel mario" and "", luigi is a palette swap of mario. in nes games such as "metroid", "the legend of zelda", and "castlevania", palette swaps are used to distinguish stronger enemies. in "mortal kombat", scorpion, sub-zero, and secret character reptile were palette swaps of each other, using yellow, blue and green, respectively. in "mortal kombat ii", kitana, mileena, and secret character jade were palette swaps of each other, using blue, purple and green, respectively. "mortal kombat 3", "ultimate mortal kombat 3", and "mortal kombat trilogy" introduced multiple palette swaps including cyrax, sektor, and ermac.