As for the OP itself, too many to remember.But as an honorable mention: Mario and Luigi:Bowser Inside Story.
Best Mario and Luigi game, and better than any Paper Mario game.Yeah, Mario and Luigi is superiorz!!!!
My (locked) thread about how difficulty should be a decision for the developers, not the gamers.
https://gamrconnect.vgchartz.com/thread.php?id=241866&page=1