Players can get the Duck in Catch A Monster by exploring in and around the large red circus tent at the center of the Mobius Circus Island. Also, you can obtain some Duck by redeeming the DUCKA & JOKAIRY Codes.
To use the spinbox machine on the Mobius Circus island and spawn the Jokaire boss, you must have 5 Ducks. The Ducks are a form of collectible item that spawns throughout the same island. So, if you are unable to find some even after intensive exploration, don't worry! In this guide, I am going to show you five different Rubber Duck Locations to make your life easy.
Where are the Ducks located in Catch a Monster?
Below, you can find all the Duck locations in Catch a Monster and the fastest way to reach them.
Duck Location 1

You can find the first Duck right at the entrance of the island, next to a yellow tree. This is adjacent to the teleporter present on the wooden bridge.
Duck Location 2

For the next one, look towards the right side of the spin box machine to find a Duck right at the footstep of the large circus tent.
Duck Location 3

The third Duck is inside the large red circus tent. From the position of the Duck Location 2, walk straight to find the tent and the Duck next to the Lampyr boss spawn area.
Duck Location 4

Go behind the large red circus tent to find a small, makeshift tent painted red and white. Look inside it to find a Duck on the ground. Remember, the Jackpotron enemy always spawns nearby. Ensure you defeat it before proceeding.
Duck Location 5

The final Duck can be found at the large spinning giant wheel, or Ferris wheel, on the right side of the island. Equip your mount and go towards this secluded area to find the Duck at the bottom of the wheel.
What are the other ways to get the Ducks in Catch A Monster?
Apart from manual on-foot exploration, you can obtain Ducks in Catch a Monster using Codes. As of now, DUCKA & JOKAIRY are the two redeemable codes, each giving you x5 Ducks. Click the gift/reward icon in the top-right corner of the screen to use the codes. Now, combined with the exploration method, you can collect a total of 15 Ducks, allowing you to use the Spinbox machine 3 times.
Why can't I see any Ducks in Catch A Monster?
The Ducks in Catch A Monster are global spawns like the Eggs, and not individual items. So, if any other player on the server reaches the item before you, they will not be visible until they respawn. I suggest waiting for 10 to 15 minutes around the same location until they appear again.
How to reach the Mobius Circus Island?
The Mobius Circus Island is 2500 meters behind the starter island. To reach the location, you must have a mount. The best way to get some free mounts is by defeating the Aquron Monster at the beach on the starter island, which allows you to travel on its back through water. If you are a Roblox Plus user, I suggest spending 14 Robux to get the limited-time Dragon Cannelloni flying mount near the Incubation area.
For more on Roblox, check out Catch a Monster Evolutions Guide or Catch a Monster Mutations Guide