Ed Asner is the voice-star of Pixar’s new charmer, and in the curt syllables of old Carl Fredericksen’s dialogue one can hear echoes of Lou Grant from the Mary Tyler Mooreshow. (“You’ve got spunk. I hate spunk.”) And non-actor Jordan Nagai does fine as Carl’s young hanger-on Russell. But director Peter Docter stayed in-house for his big scene stealer. Peterson, the movie’s co-director and co-writer, voices two canines, both man-made, that Carl and Russell meet in faraway Paradise Falls. One is a grrrrrruff guard dog named Alpha; the other is Dug, an amiably addled pooch who’s programmed to speak a half-dozen languages, but who somehow has learned on his own that a boy’s friendship is more important than following his master’s voice. With Peterson, Bird, Burt and all the other vocal talent at the Pixar home office in Emeryville, Cal., who needs celebrities?