According to GamesRadar, Proto Man will playable as a downloadable character on October 6 for 200 Wii Points.
On the heels of Mega Man 9's release date announcement comes information about the game's downloadable content. Slated for an October 6 release, the first bit of downloadable content will be a playable version of Mega Man's robo-brother, Proto Man. Proto Man will be able to slide and charge his shots, which is something Mega Man cannot do in the new game. He will also be able to use his shield to deflect small enemy fire. However, he will be knocked back twice as far by large enemy fire.
Mega Man 9 will be available on WiiWare on September 22 and Proto Man is scheduled to be available for download on October 6 for 200 Wii Points ($2).