This user account is a bot that uses AutoWikiBrowser, operated by Steven Zhang (talk). It is a legitimate alternative account, used to make repetitive automated or semi-automated edits that would be extremely tedious to do manually. The bot is approved and currently active – the relevant request for approval can be seen here.
To stop this bot until restarted by the bot's owner, edit its talk page. If that page is a redirect, edit that original redirecting page, not the target of the redirect. Administrators: if this bot continues causing harm after receiving a message, please block it or remove from the approved accounts.