First, you need to level up Nincada to level 20, sure it'll evolve into Ninjask, but, if you have an empty slot in your party, and a spare Pokeball on hand, Shedninja will be there, taking up the empty slot.
Shedinja.
Shedinja is the last evelution so no, he can't evolve.
To get a Shedinja in Pokemon Heart Gold you must trade it from either Pokemon Ruby, Sapphire or Emerald. Jacko25
Shedinja is just a normal bug type pokemon with nothing special..the game doesn't CHANGE if you dont have or have that pokemon..but yes..it is considered a rare pokemon.
In the party you should have an open space for shedinja once your nincada evolved shedinja should appear in the open slot
You evolve a ninjask with room in your party pretty simple really
Its Shedinja, and all you have to do is get a nincada and level him up to 20-21 and when he evolves make sure there is room in your party because thts where your shedinja will be.
The 292nd Pokemon in Pokemon emerald is Shedinja. Ways to obtain this Pokemon in Pokemon emerald: You need to get a nincada, to get nincada you must go to route 116, find it and catch it in a patch of grass, however it is an uncommon Pokemon, so it may take some time. After you manage nincada raise it to level 19(daycare recommended) have it last in your party, give it a poke'ball and have 1(one) empty space in your party, then level it up(rarecandy or epx from battle) then you will get Shedinja. (this is the only way to get shedinja in emerald unless you get it in a trade) HOPE THIS HELPS
ninjask does not evolve....but if you evolve nincada he will evolve into ninjask if you have a spare slot in you'r party then you will get shedinja
shedinja's powers lack the consistency of Pokemon
Shedinja, with an HP of 1!
Leave an extra space in your Pokemon party then train nincada to level 20 it will become ninjask but if you check your Pokemon party you should also notice a shedinja has appeared.