When a bot flag is given to a bot account in any MediaWiki wiki, such as one hosted on Wikia, its edits do not normally show up in Special:WikiActivity or Special:Recentchanges, unless specifically requested, as in http://pybot.wikia.com/wiki/Special:RecentChanges?hidebots=0. This is important so as to reduce the clutter of recent changes by small and/or recurring edits, often across many pages at once.
It is not recommended that you run a pywikipediabot without the proper flag.
Bot flags can be granted only by Wikia Staff within Wikia, or by bureaucrats for projects supported by the Wikimedia Foundation, like Wikipedia. Note that a bot flag is not the same thing as granting the bot admin, or sysop, powers.