Gauntlet: Dark Legacy

Go to the far upper right or left. You should be directly next to his vat. This is his blind spot, and very few attacks can reach you. Just fire away at him until he is dead. Note: This is best done with two players, one on each side of his vat.

Enable the "10,000 gold per level" code. When you defeat the Wraith, you should have 40,000 gold. Next, shop and buy 20,000 gold worth of invincibility and 20,000 gold worth of the Hammer. When you run out of hammers, Skorne should at least have half of his life gone, and you will still have invincibility throughout the entire battle. If you run out of invincibility, use a second player as a sacrifice.

To easily defeat Skorne in the Underworld, first defeat him in the Desecrated Temple and buy at least 10,000 gold worth of reflective shield. When you get to Skorne, wear the Gauntlets that he gave you and your reflective shield. Few of his attacks will hit you, and he will die within three minutes.

In single player mode, buy about 7 Lightning Breaths and stand directly next to him and use them. In two player mode, buy about 4 Lightning Breaths for each player and do the same thing. For three player mode, buy about 3 Lightning Bolts, and for four player mode, but two to three each.

Buy five or more Reflective Shields (and some Amulets if desired). As soon as you start, use your full magic attack to clear the rocks directly in front of you. Then, put on your Amulet (if available) and get your shield ready. Start throwing your big attack at him and put up your shield whenever he shoots a single fire ball. Then, turn your shield off to save power. You only will get hurt when he shoots two fire balls or stomps his foot. He should die quickly. If he uses his fire breath, you are too close -- back away. This is an easy way to gain levels and money.
Snake9z9.

Purchase at least seven Lighting Breaths before starting the level. When you get to the Boss you will see a large number of walls. Go to the one that is closest to the dragon. Wait until it attacks. Immediately after its attack ends, jump out from behind the rock and use your Lighting Breath. Immediately jump back behind it when the dragon goes away. Repeat this until the wall is gone then move to the one next to you and continue the same process until you win. Every time the wall disappears there will be some sort of food; make sure you get it.
Ian.M..

Enable the "Invincibility" code, and find a second invulnerable item. Equip both and take off the limited one. You should now glow yellow. Each hit on you will increase your health. Note: This will exceed your maximum health.

Killing the Spider Queen repeatedly. She is worth the best experience. If you have some friends playing, have them use the "Defeating Bosses" trick for rapid killing. You can get two to three levels per fight depending on how long your items lasted.

Use a total of four controllers and start a four player game. Lead all of your "decoys" into the Spider Queen's lair. Move them to the middle then kill her with your main character. After she is defeated, she will drop 44,000 gold and be worth 30,000 experience points.

Go to any level in the Forsaken Province world. Instead of destroying a generator, keep killing the enemies.
Jester.

If you have gotten to the Plague Fiend in the Sky World, use the trick where you go to the top right or left corner and attack the Plague Fiend for an easier victory. Stay there and throw your weapon at the Plague Fiend until it dies, then collect the 5 gold pieces it drops. You should have only lost about 1000 or 2000 health, and at least gained 1 level. When you pick up all the coins, you should have about 10,000 gold. Next, go shopping and buy all the Meat you can get. Should have a lot of treasure remaining to buy other items, including add-ons to your attack, speed, defense, and magic. Repeat this until you have all the items and experience needed.
JRisDaMan11.

Go to the third level of the Forsaken Province with the Antideath item available. Proceed until you get to a place with doors on both sides of it outside before the fountain. Turn Antideath on and destroy all of the doors. One will have a Black Death (which steals a level) inside. Go to it when it runs. Keep running at it and you will get a level from it because of Antideath.
Glnm888.

Save up about 5,000 to 10,000 gold and spend it on Invulnerability, 3-Way Shot, Quick Shot, and Fire Amulets. You should have about three or four of each. Fight the spider queen, and get close enough for all three shots to hit, but far enough away to not use close range attacks. You should kill the Spider Queen quickly with any character, gain about two levels, and still have all your health. You will also get 11,000 gold for every player to spend on upgrades and items.
spaz102.

Buy a lot of Thunder Hammers and Invulnerability. Then, stand in any level with generators (the first level of the first area recommended). Let the generators make enemies until that area is almost full. Then, use your Thunder Hammer and you will destroy some of them. Note: Do not destroy the generator. Repeat this to gain levels quickly.
HypnoticSheep.

The best and easiest way to gain quick levels requires at least two people. One person must have access to both the Queen Spider and the Dragon. Go to the Dragon and defeat him twice. Allow the character in training to take all the money. Spend at least 12,000 gold on Thunder Hammers, then go to the Queen Spider. Have the character in training run directly up to the Queen Spider and use the hammers while holding A. Tapping will just wear you out. The other character should stand to the side. Have the training character collect the all money, then repeat the process for defeating the Queen Spider. The character in training can gain anywhere from two to ten levels per fight.
Julz.

Note: This trick requires two controllers. Load an existing character, then create another character with the "Invincibility" code. Go to any Boss. Have the invincible character just stand there and use your character to attack the Boss until it is defeated. It drops double the gold on a two player game, which your main character should collect. Repeat this to get as much gold as needed.

Equip the "Invincibilty" code, and go to any desired level. Find a General (recommended), Golem or Gargoyle, but do not kill it. Instead, have it follow you around. Stand next to a group of enemies and/or their generator and let the General, Golem or Gargoyle attack you. While attacking you, it will also destroy enemies and their generators, leaving you unharmed. You can destroy whatever was helping you when you get bored with it.

Go to Sumner and scroll down to "Runestones". It will tell you the next Runestone location.

If you fail to find all twelve Runestones after defeating Skorne's first form, go back to any previous level. If that level has a Runestone in it, a meter appears that will show you how close you are to a Runestone. The same will happen if you cannot find the thirteenth runestone.
Julz.

Medusa (Sorceress' secret form):Second level of the Forsaken Province, towards the end.
Minatour (Warrior's secret form): Second level of Mountain Kingdom, towards the end.
Unicorn (Knight's secret form): First level of Sky Dominion, towards the end.
Falconess (Valkrie's secret form): Second level of Castle Realm, towards the beginning.
Tigeress (Archer's secret form): Third level of Forest Realm, towards the end.
Ogre (Dwarf's secret form): First level of Ice Domain, towards the middle.
Hynea (Jester's secret form): Third Level of Dream World close to the middle.
Jackal (Wizard's secret form): In the second level of the Desert Lands, towards the beginning.
Sumner: Second level of the Battle Grounds at the end.

Go to where you lower the wooden bridge. Walk near the coffins and you will hear a person screaming and pounding to get out.