Franklin (1997)

One day, when playing with Bear, Franklin begins sneezing. Noting that the sneezing fits don't seem to happen all the time, his friends diagnose him as having an allergy and after some tests, conclude that he's allergic to Bear! Franklin and Bear try to find new ways to play together that won't cause Franklin to sneeze, but it turns out that the cause of Franklin's allergic reaction isn't exactly what they thought.