Thought it was really stupid what they did with Branden the dog
For the most part I love this show, but I thought it really, REALLY dumb the way they turned Branden into a human in a dog costume, minus the ability to speak, in later seasons. I remember episodes like where he's actually playing cards with Henry and Punky...and WINNING! I couldn't believe they were expecting us to swollow that. I'm sorry, no dog in real life is that smart.
I much prefer the way he was in earlier episodes. I especially liked this one episode where Punky enters a little girl talent competition and brings Branden, and she can't get him to do anything like jump through a hoop or play dead. That made me laugh, because it's just the sort of thing that an actual (not well-trained enough) dog would act. But the way they turned him into a four-legged person with fur and a tail later in the series, I felt like my intelligence was insulted.