Lets see......it's been a while since I beat it....Rabbit, you have to get Pooh to jump in the wagon, then stop Rabbit's cabbage or something like that.....Roo, make Pooh fall into the hole with footprints coming out of it......Tiger, get Pooh to bounce on those 4 stumps.......Piglet......I want to say knock him out of a tree at the begining of the level......or maybe that's Eeyore's tail......oh well, it was just trial and error for me. I wanted to get through the actual story, so I just forgot about Pooh and ran to the end. The reward for finding all of the friends is the Bambii card, I think.
Hope I helped!