If you are evil when you die, you will go to Hell. In Hell, you cannot battle others in the next dimension as you could normally (you can still spar others in Hell). You also will not be able to purchase any of the items from the Next Dimension, nor search for Yamma Fruit or train with King Kai. Still, there are several things you can do in addition to self training.

Fight Goz or Mez: Fighting Goz and Mez are unique quests that can only be completed while in Hell. Check the quests forum for information.

Search for a Demon Horn: Refer to the rare items page to see the time needed to find one and it's benefit.

Try to escape from hell: If you really don't want to be here, you can escape from Hell as well. It takes 2 weeks to escape and you may not train while escaping.

Buy unique items: See below

Hell Items

Item	Cost	Description
Demonsbane	3,000	Equipped as an accessory.A level 4 sword that requires -3 alignment or lower to buy wield. Increases strength in battle by +X where X is equal to your negative alignment times 50. 10% less chance of being disarmed. Attacks with this weapon deal +10% damage.
Devil's Skin	2,000	Equipped on the body. Requires a -3 alignment or lower to buy and wield. Increases vitality by +X in battle where X is your negative alignment times 40. Decreases damage done by 12% in battle.
Gem of Abyss	700	Requires a -3 alignment or lower to purchase and use. Increases training gains by +6 all stats when training in Hell.
Ring of Deceit	2,500	Equipped as an accessory. Requires a -3 alignment or lower to purchase and wield. A ring that when worn will grant the user access to any advanced technique that they wish. At the time of purchase you must declare the technique you wish to attach to the ring and it cannot be changed. This ring cannot be forged.