In this case, grinding means playing the same stage more than once to earn experience for certain characters. If it were just side quests, it wouldn't be so tedious.
There's also an "item world." You basically go inside an item and fight on randomly generated maps in order to level up the item. Some might consider this bonus content, but I find the randomly generated maps to be ugly and awkward.
This is just speaking of the original Disgaea, though. Dgc and Euphoria seem to be more familiar with the latest game in the franchise.

"The worst part about these reviews is they are [subjective]--and their scores often depend on how drunk you got the media at a Street Fighter event." — Mona Hamilton, Capcom Senior VP of Marketing
*Image indefinitely borrowed from BrainBoxLtd without his consent.








