Yeah, I would prefer if you didn't. Those stories were easily my favorite of your works, and many of them are my own commissions even, which I would have to upload elsewhere if they were taken down.
I can't say that I really understand the appeal of the mermaid content you've been posting in recent years, and perhaps the only reason I am still watching is on the off-chance that you might pen another Pokemon story some day. But it's not my place to say where to direct your writing efforts, so all I can hope is that you find a new audience that better appreciates the change in subject.
If it really makes you uncomfortable for them to be on here, then I would at least have them on some other site archived if people still want to enjoy them. If it doesn't get to that level, I feel leaving them up on here as well would be nice for those who enjoy them for what they are. However, you in the end are the one who created them, so what you do with them is under your control.
I can't say that I really understand the appeal of the mermaid content you've been posting in recent years, and perhaps the only reason I am still watching is on the off-chance that you might pen another Pokemon story some day. But it's not my place to say where to direct your writing efforts, so all I can hope is that you find a new audience that better appreciates the change in subject.