Roblox Catch a Monster hides 5 Rubber Ducks across the Mobius Circus Island, and you need every single one before you can use the Spinbox machine to spawn the Jokaire boss. Miss even one and that machine stays locked. This guide covers every duck location, the fastest route to collect them, two working codes that save you a full sweep of the island, and answers to the most common questions players run into.
How to reach Mobius Circus Island
Before anything else, you need to get there. The Mobius Circus Island sits 2,500 meters behind the starter island, and the game requires a mount to cross that distance. The easiest free option is defeating the Aquron Monster at the beach on the starter island. Beat it and you can ride it across the water. If you have Roblox Plus, there is also a limited-time Dragon Cannelloni flying mount available near the Incubation area for 14 Robux.
Rubber Ducks in Catch a Monster are global spawns, not personal pickups. If another player on your server grabs one before you reach it, the duck disappears until it respawns. Wait 10 to 15 minutes near the empty spawn point and it will reappear.
Where are all 5 Rubber Duck locations in Catch a Monster?
All five ducks cluster around the large red circus tent at the center of Mobius Circus Island. Here is each location broken down.
Duck 1: Island entrance
The first duck is the hardest to miss. It sits right at the entrance of the island, next to a yellow tree, immediately beside the teleporter on the wooden bridge. If you just arrived via the bridge, look left before walking further in.
Duck 2: Spinbox machine
Head toward the Spinbox machine and look to its right side. The second duck is sitting at the base of the large circus tent, right at the footstep of the entrance. It is in plain sight once you know where to look.
Roblox Catch a Monster Guide: All Rubber Duck Locations
Duck 3: Inside the circus tent
Walk straight from Duck 2 into the large red circus tent. The third duck is inside, positioned next to the Lampyr boss spawn area. Keep your eyes on the ground as you enter because it blends into the environment.
Grabbing Duck 2 and Duck 3 back to back is the fastest sequence in the run. Both are within a few steps of each other.
Duck 4: Behind the tent
Circle around to the back of the large red circus tent and look for a smaller makeshift tent painted red and white. The fourth duck is on the ground inside it. One catch: the Jackpotron enemy always spawns nearby. Defeat it first before picking up the duck, or you risk getting interrupted mid-collection.
Roblox Catch a Monster Guide: All Rubber Duck Locations
Duck 5: Ferris wheel
The final duck requires a short detour. Equip your mount and ride to the large spinning Ferris wheel on the right side of the island. The duck sits at the bottom of the wheel. It is the most isolated of the five, which is why players often overlook it.
What are the other ways to get Rubber Ducks in Catch a Monster?
Exploring the island on foot nets you 5 ducks, but two active codes double that count without any legwork. Redeem DUCKA and JOKAIRY through the gift/reward icon in the top-right corner of the screen. Each code gives you 5 Ducks, so both together add 10 more to your total.
Combined with the 5 from exploration, that brings your total to 15 Ducks, enough to use the Spinbox machine 3 times.
Codes can expire without notice. Redeem DUCKA and JOKAIRY as soon as possible to lock in those extra ducks.
Why use the Spinbox machine?
The Spinbox machine on Mobius Circus Island costs 5 Ducks per use and is the mechanism that spawns the Jokaire boss. With 15 total ducks available through exploration and both codes, you get three attempts at the machine before needing to wait for respawns or find additional codes.
Tips for efficient duck collection
- Start at the island entrance (Duck 1) and work clockwise toward the Spinbox machine (Duck 2), then the tent interior (Duck 3), behind the tent (Duck 4), and finish at the Ferris wheel (Duck 5).
- Always defeat the Jackpotron near Duck 4 before picking it up.
- If a duck is missing, another player grabbed it. The 10 to 15 minute respawn window is consistent based on community reports.
- Redeem both codes before exploring so you have a buffer if server competition is heavy.
If you are also hunting collectibles in other Roblox games, the Roblox Easter events guide for 2026 covers every game running limited-time egg and item hunts right now. For a full collection of strategies across every Roblox game, browse the complete Roblox guides library.
