I agree with this, however there's one major complaint I have on the Isle maps: considering they are way more convoluted than the actual Wild Area, with caves, hidden path and what not... man now I REALLY wish we had a minimap or at least a compass...
That said... for science I pulled this guy out: looks like at least in Overworld they have maintained proportions (hello wild Wailords btw)
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You need to capture a Wailord and see what happens.