This port ships no game data. To play, load your own legally obtained Kirby & The Amazing Mirror (GBA) ROM file. It is read locally in your browser and never uploaded anywhere.
…or drag and drop the .gba file anywhere on this page.
You only have to do this once: the file is kept in this browser's own storage for this site (IndexedDB), on this device. It is not uploaded anywhere, and the Forget stored ROM button erases it.
You can also paste a direct link to a .gba file you have the right to use into the URL box: your browser downloads it straight from that address — it is not uploaded to, or routed through, this page.
On iPhone, Share → Add to Home Screen and launch it from there: Safari will not let a page go fullscreen, but it drops the browser chrome for a home-screen launch, which is the same thing.