>>43666360That's convergent evolution. Like, we've got whales now, but before there were whales, there were giant whale-like filter-feeding sharks (still are), giant whale-like filter-feeding plesiosaurs, giant whale-like filter-feeding belemnites, giant whale-like filter-feeding anomalocaridids. Turns out that 'giant filter feeder' is a really solid body plan, so things keep evolving into it.
Maybe it's the same for them Pikachus. They aren't related, but electric rodents are super good at surviving, so every region develops its own.
