how to create item?

hi! nice to meet you!
tell me how to create item?? I want know Item numbers....
itemset.csv?? but,it's not enough. many Item numbers are missing.

help me plz.... sorry to my poor English.

Do you mean using SQL? Edit a character's inventory and instead of an empty slot add an item (I think thats how its done)

Since you can fuck up on your item slot, just go in game, buy a pot
Leave two slots empty on the right, and bottom that way if your pot is beside another item, and you spawn an item that's long in width you won't crash saying invalid inventory or w.e.

So buy a pot, change the item id of the pot in your MSSQL to the item you want, then log in and oytu'll see it.