>>46593509Hattrene starts out as a little ball for one. Another is that GF isn't perfect but they did make changes this gen like adding gardevoir to the bipedal group and hwlucha to the flying one, I think. My point is that you can't take human like to mean anything more than being bipedal, that's what ties that egg group together. And just as I mentioned there's reptiles, amphibians and non-primates that are part exclusive to it. Of course you people also conviently ignore that Gardevoir is also part of the same egg group as magcargo and stunfisk.
And there's no definitive proof it's able to understand human speech aside from what it may be trained for. GF has made it clear via pokedex entries that understanding human speech is ultra rare within pokemon and certain pokemon entries like those of Lapras, Ninetales, Latios and Latias, Lucario, Magearna, etc point out that those mons can understand humans. It's clear the implication there is that most pokemon can't understand human language.