I want to know what monster gives off the best exp. I remembered that matable did in dwm1, but when i generated one through game shark, it didn't give off near the ammount of exp.

Go to the travel world.
When you battle one monster you get 4000-5000 exp.
When you battle 3 monsters at once you get 13000-15000 exp.

And if you want to lvl a powerful monster really quick just take one monster to that world at a time and when he beats 3 monsters by himself he will get about 40,000 exp. A good skill to know while doing this is quadhits.

the monster that gives the highest exp indiviually in the game is matalking. Just by himself he gives 15000 or 16000 exp.