How do you get easy exp in dragon quest ix?

It is very hard. You will need to grind for days/weeks. Metal king slimes give you 30,000 experience. Fight them in the dragon graveyard and use the kerplunk trick. Sometimes you can get a 120,000 experience in a single battle! Well I have a more effective way than fighting the same monsters again and again. Get a treasure map by completeing 'columbos call' then keep fighting new dungeon bosses. and as a pro theres some pretty hard bosses too. They have thousands of exp!!! once you defeat level 99 estark you either level up LOADS, get tones of gold and luckily Aquila joins your party.