Tortimer Island is unique in that the stage's layout is randomly generated each time the stage is played on. The stage is always generally flat and surrounded by water, though various inclines can be located in different parts of the stage. There is always a dock located on the left of the island, and Kapp'n will occasionally travel to it; his boat acting as a platform while he's on the stage.
Palm trees will sometimes be placed on the stage, and their tops can be used as platforms. Various fruits can be knocked off these trees: the cherries, apples, lychees, mangoes, and pears can be knocked off to heal fighters slightly; the bananas heal slightly and also drop peels after they are eaten; and coconuts and durians can be thrown at fighters to deal damage.
Unlike in Super Smash Bros. for Nintendo 3DS, fighters can swim in the water, and the shark does not appear.
Certain characters from the Animal Crossing series can appear in the background of the stage. These characters are: