On Chaper 15-1, at the end of the level two dreadnoughts appear. I managed to kill the first one but when the second one does the shockwave when spawning more enemies, the game freezes and I have to hold the power button to turn my 3DS off.
The 3DS I have is the original and I have had it since 2011. I have not had any other problems with any games or software.
Any solutions to how to fix this.