You can obtain these by selling 25 creatures for one ticket. To get creatures quickly, you can buy a "Pair" from the Time Points Shop for approximately 35 time points. Some players also trade for them in the Sailor Piece Discord.
Travel to Beach Island , located directly behind the spawn island. Speak to the Exchange NPC , who will trade you one ticket in exchange for three mythical items . how to buy tickets
In these Roblox experiences, "tickets" (Boss or Dungeon tickets) are typically earned through in-game exchanges rather than purchased with real money or Robux. You can obtain these by selling 25 creatures for one ticket
Watch these gameplay guides to see exactly where to find the exchange NPCs and how to farm tickets efficiently: how to buy tickets