Units

Expa

Expa is a pet from the Iridescent egg in Nuclear Bunker. Confirm costs, drop rates, and unlocks in the live Arm Wrestle Simulator experience.

Expa

Player guide for Arm Wrestle Simulator on Roblox: School through Space Center exits, egg prices, pet upgrades, rebirth, and codes.

What is Expa?

Expa hatches from the Iridescent egg, which costs 600t Wins in Nuclear Bunker. The published hatch figure for this pet is 14%. Equipping pets is how early training and boss fights scale beyond raw clicks. This entry does not assign a current strength multiplier, because published pet-power numbers from 2023 do not match a game whose official listing now cites 2500+ pets.

Published facts

Expa facts
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HubUnits

How do you get Expa?

Hatch the Iridescent egg in Nuclear Bunker for 600t Wins. The published chance listed for Expa is 14%.

How do you use Expa?

Equip Expa while you are still opening Iridescent eggs. Replace it when a later egg in your current world, or the next world, gives you a pet you can actually equip. Size, Golden, Void, and mutation upgrades are separate from this base hatch.

FAQ

Arm Wrestle Simulator roster questions

How do I leave the School?

Defeat Champion and hold 15,000 Wins. The Escape School door next to the bosses is the published exit into the Gym.

What does Rebirth reset?

The August 17, 2026 guide says a normal Rebirth spends Wins, sets Bicep, Hand, and Knuckle strength to 0, and keeps Trails plus your remaining Wins. Super Rebirth also resets Trails, Wins, and worlds, keeps Arms, and gives tokens worth +100% Total Strength each while you hold them. Another rebirth listing describes a flat +15% per rebirth and a different keep list, so confirm the button text.

Where do I enter a code?

Look for a Codes button on the side of the screen, or open Store and use the Codes control, then press Verify. Each code is once per account. Lists published October 1 and October 2, 2026 disagree about harborking, so that string is not marked active or expired here.

How many worlds are there?

The official experience listing says 28 worlds. A published world index names 19 normal worlds, and only School through Space Center have exit numbers here. The official listing says 28 worlds, so later names are missing.