The Battle Cats is the improved version of the original Battle Cats and is available in more than 100 countries (since November 10th, 2014). This version has lots of features, nearly matching the Japanese Version. However, you can not transfer Japanese data over to this version, as they have different servers.
Upon starting The Battle Cats (or playing the intro from the Settings), a short cutscene will explain the story behind the game:
The new English Version has all enemies from Empire of Cats and Challenge Battle and many new enemies found in other areas. Most of the enemies have a different description to be more kid-friendly, as some of the enemy descriptions in Battle Cats were pretty inappropriate.
Levels and Stages
The New English Version has 3 Main Chapters (each chapter contains 48 levels, which take place in 48 locations, from cities, states, countries, and places in the world, and even the Moon), Challenge Mode and Legend Stages (include time-limited event stages and stories of legend chapters). Version 3 added Into the Future chapter(s), the Cat Combo System, a new gacha event and 2 new sub-chapters.
Nintendo 3DS version
Nintendo 3DS version of The Battle Cats: The Battle Cats POP! (shortened: BCP!) released in June 27th, 2016 with a multiplayer mode, similar to Nyanko Daisensou's 3DS version, Tobidasu! Nyanko Daisensou.
The story of BCP! is very similar to the story of the mobile game, at least with chapters 1 and 2. In chapter 3 the Battle Cats want to take over the universe.
BCP! has a majority of the early Cat Units from the mobile game, but it is missing some of the cats and their True Forms.
There are significantly less enemies in BCP! than there are in the mobile version, as there is not any Stories of Legend nor any of the event stages.
Levels and Stages
There are a total of 3 chapters in the game, as well as Challenge Mode. Chapter 1 takes place in locations around the world, Chapter 2 takes place in Japan, and Chapter 3 takes place in space.