Don't care. He's such a minor character, why does it even matter
Like others, I agree that it's not a huge deal.
For all intents and purposes, Joy, Jenny and Don effectively are the same character, even if they're all supposed to be different individuals in-universe. They all look and act alike (Unova's regional differences notwithstanding), they serve exactly the same purpose and generally all have the same character traits. For a Joy or Jenny to show any distinguishing personal characteristics that set her apart from her sisters was always the exception, not the rule. It's not especially jarring for me to know that there are similarly multiple Parkers because I can't honestly see it making much difference in the long run - he'll still effectively be the same character, even if the colour of his collar periodically changes.
I agree with Winterdaze. It doesn't really matter. I've always liked the generations of Joys and Jenny's so I don't mind other characters having the same gimmick.
Huh? I thought it was the same guy... *Haven't watched the show in a while*
Oh well, I don't really mind him/them though...
Part-time Fanfic writer, Full-time crank.
At first I hated it and also felt like his character was destroyed a little, but now I just love it for some reason. I think I'll never know why.
But objectively speaking, it is completely unnecessary. Unlike Jenny, Joy and George, Parker doesn't work at a stable building, they could just have Ash and the others travel in the same ship during the whole Da! series without problem. The cruise could make one day-long stops, which is what seems to take Ash and the others to go from island to island; and like what happened in the Butterfree episode when they stayed a week on the island, they could just have the ship longer there due to anything.
One think that does bother me in any case, is that his name doesn't follow the kana ジ trend.
It doesn't matter if you aren't going to reach the goal, as long as you're still happy doing the trajectory.