At long last we have the main antagonist in the Turtles franchise, Shredder (also known as Oroku Saki). Even though over the years he has played both large and small parts in the various Turtles incarnations, no one can argue against the fact that Shredder is the most iconic and recognizable of the Turtles villains.
For the first seven seasons, from 1987 to 1994 James Avery, from Fresh Prince fame, voiced Shredder. In total, he played the role in 125 episodes.
After the seventh season, Bill Martin took over the role, voicing the bad guy in 12 episodes from 1994 to 1996.
Three different voice actors provided Shredders voice on a fill-in basis during the original Turtles series. Jim Cummings voiced him in 9 episodes between 1990 and 1993, Townsend Coleman (the voice of Michelangelo in the series) voiced Shredder three times in 1993, and Dorian Harewood filled in for the role in four episodes between 1987 and 1989.
In the two live-action Turtles films from the 90s even though Shredder was portrayed physically by James Saito, Francois Chau, and Kevin Nash, from Professional Wrestling fame, his voice was actually supplied in both films by David McCharen.
The next time we saw Shredder was once again in live-action form on the short-lived series, Ninja Turtles: Next Mutation. His actual actor in that series was Patrick Pon while Doug Parker provided the voice.
Next up, Shredder would return to animation in the hit 2003 series where he was voiced by Scottie Ray. Staying in animation form, Shredder was portrayed in three different styles in the fantastic made for TV Movie, Turtles Forever.
First, we had Shredder reappear as the 1987 form of Shredder, which was voiced by Load Williams.
Then we had the original Mirage Comic style Shredder who was voiced by David Wills.
Lastly, we had Scottie Ray reprise his performance as Shredder from the 2003 series.
Finally, Shredder briefly appeared in the 2007 TMNT Video Game although at this time we cannot verify who provided his voice in this brief appearance.