012E = Ninjask012F = Shedinja0130 = Taillow0131 = Swellow0132 = Shroomish0133 = Breloom0134 = Spinda0135 = Wingull0136 = Pelipper0137 = Surskit0138 = Masquerain0139 = Wailmer013A = Wailord013B = Skitty013C = Delcatty013D = Kecleon013E = Baltoy013F = Claydol0140 = Nosepass0141 = ...
And this gen made up for the low Pokémon quantity with a good dollop of quality – there’s no filler, all thriller in this Pokédex. Most notable is the disguise-wearing Mimikyu, and the incredibly weird Dhelmise, which is a ship’s anchor and wheel, all wrapped together in seaweed....
then evolve the Nincada (raise it to level 20) while there is an empty slot in your party. When the Nincada evolves into Ninjask at level 20, you will also receive a Shedinja in the empty slot in your party (but if you don't have an empty slot, you won't get Shedinja)...