The Inti-Crates 3DS Action series Azure Striker Gunvolt is getting a special retail bundle containing the already release Gunvolt 1 and the upcoming sequel Gunvolt 2. Both will be in this retail version published by Shovel Knight Developer Yacht Club Games. 
It is releasing on September 30th for 29.99$ and you can buy both on their own for 15$ per game. It is also date Gunvolt 2 is releasing on the E-Shop as well.
In addition, Gunvolt is getting its own OVA. 

Source: Twitter