Step 4 really is something to see. Even if it's a little bit more serious than funny, I think it's perfect like that. There is some funny part, anyway. Like when the bad guys are supporting. I also think this kind of humor is better for the serie (even if the Poke Ball in Step 3 was hilarious).
It was sad, and I was like "aww.." almost the whole movie, but it was really satisfying. It was absolutely perfect, and even if I'm watching it for the seventh time, (yeah, I count) it's awesome.