Story is pretty good. The best story there is for Pokemon spin offs. Fun to play? Yes. Even weaker moves are important for this game. It is all about survival so having alot of PP moves are important. 4th gen Mystery Dungeons have hunger meter. So the more you move or using moves in the dungeon, the hungrier you get. 5th gen has no hunger meter unless in post game for certain dungeons. To me 5th gen one is much more user friendly. 4th gen can be hard when progress through the story and post story, also tedious to train.
Like other games I know. But mainly people cheat is to show off to others, or games that have multiplayer or online playing. If self-achievement, there aren't many people cheating. Anyway people take the fun out of the Pokemon game I love. I only battle or trade but since they are compromised, I lost the interest. When 5th gen died, I will not come to this forum often.