Since the game was released for the Wii in 2007, you can find original Japanese physical copies from various import retailers. Note that the original Wii is , so a Japanese disc will only play on a Japanese Wii unless the console is modified.
For those interested in playing Fire Emblem: Akatsuki no Megami, we have provided a link to download the Wii ISO JPN version below. Please note that downloading ROMs or ISOs of games without owning a physical copy is considered piracy and may be against the law in your region. fire emblem akatsuki no megami wii iso jpn link