I was very impressed by this! You just never knew who was going to pop up next. My favorite part was probably seeing the cat from "There She Is!!". That guy should appear more. Why doesn't that series have its own collection? Anyway, this is still wonderful.
You have a great way of drawing all the characters. It's just great to see them all together. It's mostly brief, but at least they're there. The music is great too. Happy Pico Day!