@VeggiePopper; What you're completely failing to get is that each of those things may be fairly normal by themselves, but it's them together that makes them look similar.
Your idea of breaking down the similarities is like doing the following:
"You're saying Igglybuff and Jigglypuff look alike because they're both pink? So are many other Pokémon, like Lickitung and Sylveon! You say they're both round? So are Voltorb and Magnemite! Igglybuff has a swirl on its head, while Jigglypuff doesn't! Igglybuff has red eyes, while Jigglypuff has blue! They can't be related!"
I'm not denying that Alomomola and Luvdisc have more similarities than Mawile and Elikiteru at all and I never said that Elikiteru is a pre-evolution of Mawile at all (we know it isn't). All I was saying that the two have a slight resemblance.
But while you're saying that all Pokémon need to resemble other Pokémon in their evolution family perfectly and have the same basis:
Carvanha and Sharpedo. A red Piranha evolves into a blue shark.
Remoraid and Octillery: A little blue fish becomes a red octopus. Sure, it's meant to reflect the change in power from a handgun to a cannon, but it's still weird.
Hoppip and Skiploon: An entirely red Pokémon becomes green.
Gloom and Belossom: A purple, bad smelling plant becomes a hula dancer.
Snorunt, Glalie and Froslass: All completely different bases.
Trapinch to Vibrava.
Dratini and Dragonair to Dragonite.
Rhydon to Rhyperior (talk about a drastic colour change!)
The list goes on.