Well, I finally figured out how to get Tanktastic Wiki articles onto the Wikia Game Guides app. It wasn't as hard as I thought.
How to get it:
1. Download this app from the Appstore or Google Play store.
2. Search for "Tanktastic", and add the one that has 200+ pages, not 4 pages, to your communities.
3. Now you can browse the main articles! I've only added the tank and map categories so far, since other pages are mostly unfinished.
...And that's it!