It's out in japan. As far as I know it became a huge success over there. The company that made it have stated that they are localizing it, so we should get it this year too.

Cool. Even though I don't own the original.

It's when the quirky little weird games like this are being released and even getting sequels that you know a system's really doing well.

I didn't feel like I grinded a lot. You just need to figure out their weaknesses and pick the denpas that are strong against them. You can actually beat them easily even if you're under level.
Here's a tip.
Aside from the obvious fire strong against ice, it's also strong against another element.
Each element is strong against 2 other elements. Which means, each element also have 2 weaknesses.
Exception to dark and light, of course.