Etna's diary:
There are two hidden switches in the castle. One is behind the throne, and another 
is near the skull on the counter of the Rosenqueen shops. Flip both of them to 
allow access to Etna's diary, which is in the middle corner of the intermediate 
hallway between the throne room and the shops. If you visit this area consistently 
for each chapter, you will be rewarded with a Testament item in the final chapter.


Get the most out of your turn:
If you are trying to level all of your characters mainly by using team attacks, etc., 
move all your characters into position for a team attack. As long as none of them 
besides the initial attacker have not performed any actions, after the team attack 
you can move them back to their original locations and move them again. Repeat 
this as desired. This also works if your characters are just out of a healers range; 
you can move them, heal them, then move them back into battle.

Easy experience:
In stage 5, level 3 (Terrible Cold), there is only one Geopanel that does not have 
the invincibility attribute. Combine all the enemies by throwing them into each 
other, making one high level enemy. Throw the enemy onto the Geopanel that is 
green. Trap him/her on the Geopanel without invincibility by surrounding him with 
your characters. Since all of your characters are on invincible panels you cannot 
be defeated, yet you can wear down the high-level enemy who is trapped on the 
non-invincible panel. This is a great way to jump 10 levels at once early in the 
game. 

Get to the Jotunheim episode and go to Terrible Cold area. The entire map will be 
invincible except for one location. Throw all of the Sexy Demons together. This 
should get you about a level 114 Demon. After that, throw her all the way to the 
corner at the top of the map that has the "None" status and surround her, one on 
each side. It helps if your attack is at least 300 on each of the characters that are 
attacking. It also speeds the process if you bring one or two Mages with Brave 
Heart. Keep casting that on your characters every turn, as it is stackable. This 
trick is worth the time, and gains about four to six levels for each character in the 
team attack.

In episode 9, level 1, there are only nine enemies in the level. They are in a 3x3 
block. Use Mage's 9 square attack or Laharl's Winged Slayer attack to hit all of 
them at the same time. For any that remain, use your lower characters to finish 
them off. You should be able to kill all the enemies on your first turn, so you never 
get hurt. This usually works when you are between level 20 and 45 to 50.

Unlock Majin Class
To unlock the majin class, you need each of the following classes, at level 200: 
warrior, male brawler, ninja, rogue, and scout. The majin is the best class in the 
game.

Good bonus points
Do the color combos. (they'll tell you how to do it in the game)

How to get good weapons and lots o money
The best way to get lots of money and good weapons go to the item world with at 
least 10 characters that are strong. And please got to weak weapon first.(you'll still 
get the money and the good weapons)

Hidden Switch
If you go behind the throne in the overlords castle and fress X it will ask you if you 
would like to press a switch. Currently i have no idea what that switch does but i 
hope to find out soon enough

Another switch
There is another hidden switch in the skull in between the weapon and armor 
sellers at the beginning of the game.

Selecting Monster Character with Little Mana
After defeating a monster it will show up in Character select. It will be selected 
only with lots of Mana. In order to get the Monster with little Mana, go where you 
can fight the Monster, and keep defeating him until its Mana cost drops to where 
you can get it at your cost. Every time you defeat it go to Character select and 
watch the mana drop.

Level up characters and weapons quickly
To quickly get your characters and their weapon levels up, go to a stage that has a 
large amount of 'Invincibility' geopanels such as Episode 5, Stage 3. In stages like 
that you can manipulate the enemies onto the non-invincible geopannels and 
hammer away on them without having to worry about taking any damage. Once 
the enemies have become too weak to derive any real experience from, you can 
lift them and toss one onto the other to combine their levels, making one high 
leveled monster. Repeat the drill until your characters and weapon levels are 
where you want them.

Gaining More Experience:
If you want to level up faster, just throw your enemies into each other, so they will 
combine into bigger enemies who are worth more experience points. 

How to level up faster:
Once you open up the area "Cave of Ordeals". Go through it until you reach the 
3rd area. Here you will find 3x3 rows of enemies and the field has a "Exp 50%" 
Geo panel on it. If you can use a 3x3 attack to kill all the enemies in this stage in 
one swoop, your character will level up insane amounts. You can take a level 1 
character to level 200 if they have a high enough attack. Also be warned that the 
enemies in this stage have high defense, either bring out other members to 
weaken the monsters up or you can have one warrior bravehearted by a team of 
mages.


Getting Testaments:
Go to Prinny Land 3 periodically, as you can steal Testament from Prinny God as 
many times as desired.

Overlord Priere:
Complete the "Alternate Netherworld" Side Area to acquire Priere. To defeat 
Priere, after killing the other two monsters, throw her to one of the floating square 
around the stage, and pummel using Dimension Slash (or any other desired 
skill/magics). If using physical attacks, having more than 45000 ATK is strongly 
recommended. Note: Her accessory Arcadia cannot be stolen. 

Witch Marjoly:
Complete the "Beauty Castle" Side Area to acquire Marjoly. To defeat Marjoly, 
deal with the two mages first so they will not heal anybody. Then pummel her with 
your best attacks before she uses any of her powerful spells. Note: None of her 
items cannot be stolen.

Tyrant:
When the "Baal Castle" Side Area is completed, Laharl will be promoted to 
the "Tyrant". Whenever Laharl enters the Dark Congress, his "reputation" will be 
boosted, meaning that almost any proposal will be approved without bribing at all.

Training high-level characters:
As preparation to level-up the characters, you will need a tremendous amount of 
money; 3 billion HL is ideal, but you could gain money fairly quickly by entering 
the World of some powerful item, and then by selling it. Assuming that you have 
the highest Customer Rank, shop around and look for items on sale with at least 
one 40 Statistician on it. Then enter its world and subdue the specialist. Note: 
Having the "exit" will save a lot of time. For one unsubdued 40 specialist, you will 
have 80 when its subdued. Try to subdue and fuse them until they are exactly or 
more than 300; which will mean you will need 150 Unsubdued Statistician. Equip 
the item with the 300 Statistician you have just made to the character you want to 
train. Then, go to Cave of Ordeal 3 and keep killing the monsters there. Having 
the 300 Statistician that will actually quadruple your experience. You will be 
leveling up four times faster than normal. However, tripling the experience using 
Dark Congress will not help much; it only applies to one monster. If you find Cave 
of Ordeal 3 too difficult, go to Field Of Virtue in Celestia instead. Then, fuse all the 
vampires into one and kill it. Also use this method when your character has just 
transmigrated and is not powerful enough to complete Cave of Ordeal 3 by himself 
or herself. After about one hundred levels (or several hundred after 1500+), 
transmigrate. This means that if the level before transmigration was 300, then 
transmigrate when you reach 400. Do not transmigrate when the level is lower 
than it was before, as this will weaken your character. Always make sure to 
transmigrate your character as a genius. If you do not do this, it defeats the 
purpose of transmigrating. Make sure to raise the monsters' levels after they get 
too slow. If you raise the monsters' levels to max, clearing the Cave of Ordeal 3 
(level 750 and 810) will give you 20 level boosts after getting past level 2000. If 
you want to level-up multiple characters, then it is recommended to obtain another 
300 Statistician, considering that you cannot transfer specialists within battles. 
Level up your weapons as much as possible. Get the legendary weapon by stealing 
from monsters or by bonus, and try to max it out to level 100. It is very critical to 
transfer as many corresponding specialists as possible; they boost the weapon 
power. Specialists' power does not count -- just try to fill the item with the same 
specialists. For example, if you were using a sword, then fill the sword with 
Dieticians (legendary items have 9-13 Pop in default) and boost its level. For the 
bow, fill it with half Dieticians and Marksmen. It is also critical to defeat all the 
Bosses in the Item world, as they increase item power or Pop. After finishing the 
30th, 60th, and 90th floor, add another Dietician to it. To deal even more damage, 
train your weapon mastery skills. Using the method for Statician, collect 1900 
subdued Armsmaster, equip it, and go to a stage with invincibility. Fervent Melody 
in Sea of Gehenna is recommended. Once there, get an ally to pummel each 
other, rather than just killing monsters as usual. This strategy can gain mastery 
skills much faster, and you can do this as much as desired. After you are done, 
finish the stage. Raising the levels of each skills, however, is a big challenge. Since 
there is no way to boost the speed of gaining skills' levels (Armsmasters do not 
help them), all you can do is keep using it. This is, however, not recommended for 
monster characters; their skill levels will be reset to zero every time they 
transmigrate. The same is true for character-specific skills.

Senator Gift List rankings:
The following is a list in order from best to last when you "Give Gifts" to the 
Senators in order to have them vote in your favor when submitting a proposal: 

1. Total Support
2. Strongly For
3. In Favor Of
4. Leaning Yes
5. Either Way
6. Leaning No
7. Against
8. Strongly Against
9. Loathe
10. Total Opposition 
Of course, giving them an item that has "Must Have!" will definitely jump at least 
one space. If you give them an item that they are just "Interested" in, it 
sometimes takes two or more depending on their level. Giving them any lesser 
items is a waste of items unless you are desperate for votes.

Better hospital items:
When you earn prizes at the Netherworld hospital, you can get rare versions of the 
prizes. When a prize becomes available, just keep selecting "Get Treated" and go 
back and look at the prize in "Claim Prize". The stats will have changed. Keep 
repeating the process until it has the desired stats or rarity. Note: You do not have 
to heal anyone when selecting to get treated. 

Ronin with 777 HP:
Create a Ronin and make her skilled. Get her to level 27 (she will have Counter 
2). Equip her with the following: Broad Sword (Rarity 83, SP+ 6, Atk+ 65), Power 
Jacket (Rarity 217, HP+ 4, ATK+ 15, DEF+ 51), (Rare) Belt of Will (Rarity 17, HP+ 
9, ATK+ 47, DEF+ 3), Muscle Victory (Rarity 88, HP+ 311, RES+ 25). If this does 
not work, try putting those items on her when you create her. Rarity does matter.