What you described is, as you said, the checkuser right. You can't make a script to do it because you would still require the checkuser right to obtain a user's IP address.

As for wikis the user has edited on, you can do that yourself with a simple Google search.

As mentioned above, the checkuser tool does this. There's a reason checkuser is restricted, it's not given out on wikis except in very unusual circumstances and a big history of vandalism. Even then it's restricted to a small number users as opposed to being given out to say every admin on a wiki.

The wikis a user has edited on can be looked up with another tool, but again it's restricted to staff, vstf and helpers. It requires looking up various things server side which can't be replicated in js (as does checkuser).

I do see that VSTF can check users when it's either vandalism or something else like harassment, bullying and such. I did report a user who keeps vandalizing the logopedia wikia and does all this bogus logo junk.

VSTF won't do checkuser requests, they need to be sent in to staff. I'm not sure of the circumstances that allow them to use the tool, but it's always to be used sensitively.

I'll do that right now. But the VSTF have the right to check users though.

as its always mentioned, always ask staff. staff will either make the necesarry blocks or direct vstf to keep an eye on the wiki.

I have managed to get vstf during an event and they helped in chat on a wiki, that was limited to calling out sock puppet accunts + blocks. they still won't tell you the ip.

It's solved.