Lesson II: What the **** is with Alomomola?

The Caring Pokémon, Alomomola, is found only in Unova. Now, Unova isn't my particular area of expertise (for example, I have no idea what's going on with those sports visors nowadays), but this particular Pokémon raises an interesting question: How is it possible that this pink, heart-shaped Water-type Pokémon completely unrelated to the other pink, heart-shaped Water-type Pokémon, Luvdisc?

A little information on Luvdisc: Luvdisc are native to Hoenn, but they can rarely be found in nearly every region. They are pink in a perfect, thin heart shape. It is said that a couple finding this Pokémon will be blessed with eternal love, but that is considered a myth. Couples in Johto give Luvdiscs to each other as a sign of love.

Conversely, Alomomola are almost twice as tall and over three times heavier as any Luvdisc. Alomomola, unlike Luvdisc, possess dorsal fins and ventral fins. Its eyes have golden irises and a mark that appears to be an eyelash. They are a lighter shade of pink and have different markings.

There is no evidence to suggest that Luvdisc and Alomomola share a common ancestor any more recent than, say, Alomomola and Basculin. But how, then, did they develop such similar body shapes and pigmentation? Two words: convergent evolution.

Now, I don't mean evolution in the "Bulbasaur to Ivysaur" sense, I mean the long-scale evolution, natural selection, that sort of thing. Convergent evolution is when two merely distantly related creatures evolve to fulfill the same niche. For example, Basculin and Remoraid, or Magikarp and Feebas. They appear similar, but they are not related.

Conclusion

While Alomomola and Luvdisc appear to be related, they both evolved to fulfill the same niches. They are not more related than they are with any other Water-type Pokémon.