Don’t chase a Wii ROM. Buy Mega Man Legacy Collection 2 on Steam, Switch, PS4, or Xbox — you’ll get the full game with extras and no legal gray area.
Regarding the ROM for the Wii, it's essential to note that downloading or distributing ROMs for copyrighted games without permission is illegal. However, for those interested in the game's mechanics or looking for a nostalgic experience, Mega Man 10 remains available for purchase on the Wii Shop Channel or through re-release on newer consoles. mega man 10 rom wii
Mega Man 10 was originally released on (digital download, not a disc). You could buy it from the Wii Shop Channel — but that shop closed permanently in January 2019. If you already bought it back then, it may still be redownloadable from your Wii’s download history (Nintendo’s servers for Wii still allow that for previously purchased titles, but new purchases are impossible). Don’t chase a Wii ROM