Kill Vrook on Dantooine and loot them from his corpse
No, there is no such possibility on the game. The unic Dark Jedi that gives you something is Sion, a dark jedi master robe. You can just find Nihilus's robes if you use a cheat.
find it in loot, spawn it or use a file editor to get spawn the robe
No you don't need KotOR I to run KotOR II.
You will permanantly get him when you leave the Telos polar base on the planet Telos where you meet the Jedi in white clothes. Before that there are several times where you have T3 briefly.
Kill Vrook on Dantooine and loot them from his corpse
No, there is no such possibility on the game. The unic Dark Jedi that gives you something is Sion, a dark jedi master robe. You can just find Nihilus's robes if you use a cheat.
You can not do so without modding.
I didnt need a code for jedi outcast 2 or kotor
No.
find it in loot, spawn it or use a file editor to get spawn the robe
mandalore wrom my point of wiew but disciple can become jedi
In KotOR 1 you must be trained by the Jedi Council on Dantooine, and the class you choose is always a form of Jedi, even if you turn to the Dark Side. In KotOR 2, when you choose a prestige class, the names of the available classes are dictated by your alignment throughout the game (Sith for Dark Side, Jedi for Light Side).
You need to take the shuttle inside the base on the surface of Telos.
ya cant get the mask and he/she used dark jedi master robe
Purge 1 (KOTOR 2): 15 Purge 2 (Episode 3): around 50-60
if you are a very good moder then yes it is possible