You can use a Moon Stone to induce evolution for specific Pokemon:
Nidorina ---> Nidoqueen
Nidorino ---> Nidoking
Clefairy ---> Clefable
Jigglypuff ---> Wigglytuff
Skitty ---> Delcatty
Munna ---> Musharna
http://pokemondb.net/evolution/stone
