From Inkipedia, the Splatoon wiki

Mechanics in the Splatoon series are features or items present in the game. Mechanics appear primarily in the single-player campaigns: Octo Valley, Octo Canyon, the Octo Expansion, and Return of the Mammalians.

  • In Splatoon, the only multiplayer stage which features a mechanic is Ancho-V Games, which has propeller platforms.
  • In Splatoon 2, almost all stages have Inkrails and/or sponges in some of the modes, and the Splatfest-only stage Shifty Station has variable layouts, each featuring a different mechanic or two.
  • In Splatoon 3, most stages feature Inkrails and/or sponges in some of the modes.