Der Langrisser Cheats

When a character class changes, he or she still retains any
items equipped. You can use this to your advantage. For example, say your Elwin started as a Fighter.

Fighters can equip Speedboots, but Knights can't. If Elwin has speedboots equipped and class changes to SlvrKnt, he will still have the speedboots equipped, even though SlvrKnt cannot equip speedboots.

(Hint: You can use this trick in conjunction with Runestones and Scout classes to equip ranged weapons.)

This trick allows you to duplicate any item. (Even limited items such as Langrisser or Runestones). The limitation is that the cloned item will have to stay equipped.

To start, equip said character with desired item to clone. Beat a scenario. Save the game, and go back to the load menu.

Scenario Select back to a scenario where said character appears as a NPC.

You'll still have the item the character equipped in your inventory. This is the cloned item. Equip that item to whoever you want. This action will swap the cloned item with the real item. Now, once you start the scenario, the NPC will be holding the cloned item, and the real item will be equipped to whichever character you gave it to.

Once the NPC joins your party, the NPC will retain the cloned item.

Make sure you don't unequip the cloned item, or it will disappear.