Shedinja does not evolve.
nincada evolves at level 20 in Ruby/Sapphire it also evolves into shedinja so you better leave space in your team
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.
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.
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
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.
shedinja doesnt evolve nincada evolves into ninjask and if you have room for another Pokemon and a pokeball ninjask will split in half making shedinja
Ninjask or Shedinja.
Shedinja does not evolve any further than its current stage.
Once Nincada reaches level 20 it can evolve into Ninjask. However, if you have an open spot on your team another Pokémon Shedinja will appear also.
Ninjask cannot evolve any further. If you are meaning Nincada, it can evolve into Ninjask at level 20, but it can also evolve into Shedinja, if you have an empty party slot and a Pokeball with you.
Shedinja is the last evelution so no, he can't evolve.
Weezing does not evolve in Pokemon Ruby.