Handy Manny is at Hollywood Studios. His current rotation is every half hour, switching with JoJO. We found him to be one of the least interactive characters. My 4 year old was a huge HM fan, but after encountering Goofy, Donald Duck, Chip n Dale, etc, he was far more interested in seeing them again, rather than Manny.
Very little Manny merchandise in the parks as well. Just for your info.