The numbers
The Pokemon Arena 2D APK file is 232 MB. After install and the first-launch data unpack, plan on roughly 700 MB to 1 GB of total space used. That is the honest footprint.
The Arena 2D game homepage lists the full file details this guide is based on.
Why is it 232 MB?
Three things eat the megabytes in the file from the APK download page: the fighter roster sprites and animations, the arena backgrounds, and the audio. 2D fighters are asset-heavy by nature; every frame of every fighter ships in the file. There is no separate data download to shrink the initial install.
Freeing space before install
Clear cached data in Settings, move photos and videos to cloud backup, and uninstall apps you have not opened in months. Aim for at least 1 GB free before tapping the file from the Pokemon Arena 2D APK download page.
After installing
You can delete the APK file itself once the game is installed; the installed app does not need it. Keep 500 MB of breathing room afterward so updates install cleanly. The homepage tracks the build, so you will know when the file size changes with an update.
