I finally found him, the final boss of Dex-chan default pfps.
You have been invited to the secret hideout of default Dex-cha pfps, shhh don't tell anyone about this:
https://forums.mangadex.org/threads/default-hideout.1893045/
You have been invited to the secret hideout of default Dex-cha pfps, shhh don't tell anyone about this:
https://forums.mangadex.org/threads/default-hideout.1893045/