Ironfist Insights never talks to wavu on your behalf. Cloudflare blocks scripted requests, and there's no per-player API to call anyway. So the job is split: a short script reads the match table off a wavu page you already have open in your own browser, and downloads it as a file you import here.
1. Open your player page
Go to the Data page and follow the wavu link with your Tekken ID filled
in. It opens wank.wavu.wiki/player/<your id>?limit=5000 in a new tab. The
limit=5000 is load-bearing: the default page only shows your 500 most recent
matches.
2. Run the export script
Open DevTools (F12) on that tab and go to the Console. Some browsers warn the
first time you paste into it. Chrome and Firefox both call this "self-XSS
protection." If pasting does nothing, type allow pasting, press Enter once,
then paste again.
Now paste the loader line from the Data page and press Enter. It pulls the real
script in as a normal <script src> tag and runs it on the spot. A
.ironfistinsights file downloads. That's the whole step.
Rather read the full script before you run it? The Data page has a disclosure for that too. The loader exists because pasting several kilobytes directly into some consoles (Firefox especially) can silently truncate the paste, and then the script never runs at all.
3. Import it
Drop the downloaded file onto the Data page, or use the file picker. Import is idempotent: re-import the same matches and they come back reported as duplicates, adding nothing. Run the script again in a month to pick up new games and nothing gets doubled.
More than 5000 matches? Run it once and the console prints a follow-up URL for the next page. Import both files. Overlapping matches dedupe on their own, whichever order you feed them in.
4. Back up regularly
Your data lives in this browser and nowhere else. Some browsers (Safari in particular) can evict site data after a period of inactivity, and there's no copy on a server to fall back on. Export a backup from the Data page periodically. Where your data lives, and the backup format covers what that file holds and why it's checksummed.