The Shell-Out Machine is a gachapon machine in Splatoon 3 that dispenses various items in exchange for cash and Conch Shells (Only during Splatfests). It can be found in the lobby in between Crab-N-Go and the locker room.
It normally costs 30,000 cash for one attempt, but the first one daily instead costs 5,000. During and prior to Splatfests, players will also be able to exchange 1 Conch Shell for an attempt.
Items that can be obtained from the Shell-Out Machine include: food & drink tickets, ability chunks, locker decorations, Tableturf Battle card booster packs, banners and titles.