Shuckle, used to be #2 with poliwhirl as #1.
As a child I absolutely adored turtles, they were my favorite animals. You would think I would like squirtle then but I thought they didn't do turtles justice, they acted nothing like them. Then comes shuckle. It was on four legs, had ahard shell, was slow but high defenses, and did little else then laze around. Naturally I loved it. Later on of course I see that shuckle is more of a scale insect then anything but honestly that makes me love it more. I love how indescribable it is. It's simply shuckle, and I love that. I could write an essay probably on why I love it but I'll leave it at this, I find shuckle to be the most clever, intetesting, and funniest concept and design in the series.