Cash is the main currency in the Splatoon series. It is mainly used to purchase items such as weapons or gear from the shops in Booyah Base, the Galleria, and Splatsville, but has a variety of other uses based on the game.
Spyke and Murch have different services that require cash, such as rerolling abilities and scrubbing secondary ability slots. Players can also order gear that other players they see in Inkopolis Plaza, Inkopolis Square, or Splatsville are wearing, and can pick it up the next day at a price that depends on the rarity of the gear and the number of unlocked slots on it. In Splatoon 3, weapons are no longer purchased with cash, but instead with Sheldon Licenses. However, Splatoon 3 introduces the ability to purchase decorations from Hotlantis, try for various prizes with the Shell-Out Machine, and play music with the Jukebox.
Cash can be obtained by completing multiplayer battles (both Regular Battles and Ranked Battles), completing Salmon Run shifts, using the vending machine in the Deepsea Metro, using the Shel-drone, and, in Splatoon only, talking to Judd with a great enough vibe or winning amiibo challenges. With each stage rotation in Splatoon, the player can turn in their vibe points earned via online battles to Judd in Inkopolis Plaza for a cash bonus. Gear bought with cash can only be used in multiplayer battles.
The amount of cash earned after a battle directly translates from the number of points gained and can be increased using tickets. These multiply the cash earned by 1.5×, 2.0×, or 2.5×. For example, if a player under the effect of a 2.5× cash ticket inks 872 points of turf during a Turf War match and wins the battle, adding an extra 1,000 points, they will earn 4,680. In Splatoon 3, 2.5× tickets are replaced with smorgasbord tickets that give a 2.0× bonus to every member of the player's team in each match it is active for; the effects of multiple tickets do not stack.
In Ranked Battles and Anarchy Battles, the amount of cash is directly linked to the number of points obtained by the team. Additionally, a 3,000 bonus is granted for a victory. For example, if a player wins a match with a knockout, they get 500 for the points and 3,000 for the victory.
Octo Valley, Octo Canyon, and Return of the Mammalians have a separate currency, Power Eggs, that is used to unlock or upgrade gear and weapons, as well as purchase drink tickets after all upgrades are unlocked in Splatoon 2 or use the Shel-drone once per day in Splatoon 3. The Octo Expansion also has currency in the form of CQ Points, which can be used to enter test stations and get items and cash from the vending machine that becomes available once the player returns to Deepsea Metro after completing the story of the expansion.
- Some Sunken Scrolls and UI elements refer to cash as "G", which may imply that the arrow design seen on the coin is a stylised letter G. In Nintendo Badge Arcade, there is a badge of the coin called "ゲソコイン" ("geso coin", "geso" meaning squid tentacle). The currency is also referred to as "ゲソ" ("geso") in Japanese throughout badge prerequisites in Splatoon 3.
- In Splatoon, purchasing every piece of equipment and filling all slots in all pieces of gear without using Super Sea Snails costs a total of 10,885,800.
- In Splatoon 2, purchasing every piece of equipment costs a total of 3,575,917.
- In Mario Kart 8 Deluxe, when battling on Urchin Underpass in the Coin Runners or Renegade Roundup modes, the standard Super Mario coins are replaced with cash.
A promotional image explaining the use of cash
The Crust Bucket food menu. The food selected increases battle cash earned by 150%.
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