First of all you need only 5 Pokemon in your party (because Nincada evolves into Ninjask, and you get a Shedinja after that) and secondly you need at least one pokeball and you should get it.
20
nincada evolves at level 20 in Ruby/Sapphire it also evolves into shedinja so you better leave space in your team
The only way to get NINJASK is to get a nincada near rubusto city and evolve it!
You must migrate the Item from ruby emerald or sapphire to evolve nincada
Nincada evolves into Ninjask at level 20 while Nincada evolves into Shedinja when you level it up while you have space in your party and your belt.
Nincada evolves into Ninjask at Level 20.
Ninjask is the highest evolved form, thus meaning he cannot evolve any higher. But it is possible to get two different Pokemon from evolving his pre-evolve form Nincada. Simply Evolve Nincada into Ninjask with an open slot inside your party and you will get Shedinja.
just evolve nincada and make sure you have a spare poke ball and an extra slot
To get Shedinja you need to a Nincada. Level up your nincada, but make sure you have an empty space in your party. level up nincada to level 20 and it will evolve into ninjask. then look in your party... you will have a pokeball with shedinja in the empty space
If you mean Shedinja, you get it by training a Nincada to level 20 and having an empty slot in your party. The Nincada will evolve into a Ninjask and the empty slot will be filled by a Shedinja.
Nincada cannot be found in Pokemon FireRed. You have to trade them from a copy of Ruby, Sapphire, or Emerald.
You can only get Shedinja if you have and extra space in your party and an extra pokeball when Nincada evolves into Ninjask. It is a "special" or "castoff" evolution.