Could Bonnie be a counterpart of Yellow?

My brother pointed out that Bonnie and Yellow (from the adventures manga) look similar. Could they possibly be related?

No. Bonnie and Yellow are nothing alike.

They may look similar but they're not related one bit. Yellow hails from Kanto, Bonnie hails from Kalos. Two distinctive regions and two distinctive characters. Yellow is much older than Bonnie too and although it would raise an eyebrow if they happened to be related, the odds are so minuscule that its not even worth exploring.

moving this over to Pokemon General :)

It is possible she is a counterpart, but they are different characters.

Since the comic and the cartoon don't have any relation with each other, I'd say they might not be related.

They aren't related; they do look similar tho.

I don't think so, I think the only similarities they have is that they are blonde short girls that love Pokemon. I don't think they are related because those are pretty common traits that can be share between people who aren't related.

I don't think they're counterparts either. Yellow is more of a typical cleric character as she's shy, caring, and she doesn't really like to fight unless they have to. She even has the ability to heal. While Bonnie is more so an excitable and curious child.

Nope, they aren´t counterparts of eachother, neither are related. They come from two different regions with different culture

It's probably just a coincidence. It's not like Yellow has a particularly unique appearance that makes any character that resembles her automatically related in some way.
Plus even appearance aside it's not like there's any connection between the two. They're very different.

Yellow has the power to heal pokemon and understand them telepathically in the manga. Bonnie cant.