Kids can come to odd conclusions on this kind of thing. My son's preschool class was not very diverse. The two kids in his class who caused him a lot of grief were the two who had dark skin leading him to conclude at four that kids with dark skin are meanies.

He also spent a day at work with me once and met two female judges and a female mayor. This lead him to lament "Well, that isn't fair. I can't be anyone important unless I am a girl!"

The character's in the Pokemon cartoons are all different shades and often have crazy colored hair.