i'm in your conscience
Yeah it's interesting to see how even designs have changed, of course, that's judging by sprites alone and not looking at official art. Dratini for example had a segmented belly, but it was later removed. Most notable physical differences are just like...some Pokemon went on diets, like Pikachu above lol. And then some get palette swaps, like Jynx and Gligar. So yeah it's neat to see how they've changed over time, whether on purpose or not.