Guide
Arceus X Neo Menu Not Showing? The Fixes That Actually Work
No floating button, no menu: work through the overlay permission, the key state and the build checks in the order that solves it.

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You installed it, you signed in, and there is no button. This is the single most common problem readers write about, and it is nearly always one of three causes. Work this list in order, the way our reviewer does on the rack for Arceus X Neo APK.
Cause one: the overlay permission
The menu floats above the game, and Android hides it unless the display-over-other-apps permission is granted. Open Android settings, find the app, grant the permission explicitly (do not rely on having tapped yes once inside a prompt that may have been dismissed), then force-close and relaunch the game.
Cause two: the key state
An expired or never-completed key can leave the menu locked even though the app opens fine. Check whether the app is asking for a key; if it is, run the flow fresh, paste carefully, and confirm the unlock message before joining a game.
Cause three: the build
If permissions and key are right and the button still hides, suspect the build itself: an interrupted download or a stale version left behind after a base-game update. Reinstall the current verified file from this site, over the top, and test again in a simple experience. Work the three causes in order and Arceus X Neo almost always reappears.
Prevention: keeping the button alive for good
Once the menu returns, spend two minutes making sure it stays. Whitelist the app in your phone's battery settings, because aggressive power management is the repeat offender behind buttons that vanish a day after a fix. Re-check the overlay grant after any major Android update as well, since system updates occasionally reset special permissions without telling you. Neither step is glamorous, and together they prevent most recurrences we hear about.
Keep your install honest too. A current, verified build rules out the entire stale-file family of causes, and installing updates over the top preserves your settings while it refreshes the client. If you ever need to reinstall from scratch, the download page carries the checked file, and the Android install guide walks the order, official app first, overlay grant last, that makes a clean setup stick.
Finally, learn to read the pattern of a disappearance. Button gone after a system update points at permissions. Button gone after a game update points at the build. Button gone after a battery warning points at power management. Naming the pattern halves the fix, and the common errors catalogue collects the rest of the recurring patterns in the same symptom, cause, fix format. The menu rarely hides without leaving a clue; these habits teach you where the clues live.
Work the causes in order and the button comes back. Arceus X Neo hides for ordinary reasons, and Arceus X Neo returns for ordinary fixes, which is the most reassuring sentence in this entire guide.
Quick Answers
The button appeared once and vanished. What changed?
Usually a permission reset or an app update. Re-grant the overlay permission and relaunch fully.
Does battery saver hide the menu?
Aggressive battery modes can kill overlays on some phones. Whitelist the app and test again.
I granted everything and still nothing. Now what?
Reinstall the current build from this site. A corrupted or outdated install is the remaining usual cause.