so who does pooh's voice?

Cummings is a wonderful talent. He actually took over the role of Tigger well before Winchell passed away, back in The New Adventures of Winnie the Pooh. I think Winchell simply retired. Cummings has been Pooh and Tigger for all of the more recent Pooh films as well, including Piglet's Big Movie, Pooh's Grand Adventure and Pooh's Heffalump Movie, among others. Cummings also does many other voices in Disney features as well. For example, he did the voice of Kaa in The Jungle Book 2, a role originated by Sterling Holloway, the original voice of Pooh.