Cash

Cash is the in-game currency of the Splatoon series, with their appearance being similar to that of coins from the Mario series, though with an arrow shape in the center of the coin instead. Within the Mario franchise, it appears in Mario Kart 8 Deluxe on the Urchin Underpass battle course when playing in the Coin Runners or Renegade Roundup modes, replacing coins from other courses, similarly to Rupees in Hyrule Circuit and Bells in Animal Crossing. They appear scattered throughout the course and function identically to coins (boosting speed in Renegade Roundup and serving as the primary objective of Coin Runners), though they make a unique sound effect when collected. Due to coins not being accessible from Item Boxes in Battle Mode, it is impossible to obtain cash via an Item Box.