Genderless Pokemon

These are genderless Pokémon. 

All Legendary Pokémon like Articuno, Zapdos, Moltres, 

Mewtwo, Raikou, Entei, Suicune, Lugia, Ho-oh, 

Kyogre, Groudon, Raiquaza, Registeel, 

Regirock, Reshiram, Regice, Zekrom, 

Giratina, Dialga, Palkia, Cobalion,
Terrakion, Virizion, Xerneas, 

Yveltal, Zygarde, Solgaleo, Lunala, 

Type: Null, Silvally, Cosmog, and Cosmoem are genderless Pokémon, 

and so are the regular Pokemon like 

Magnemite, Magneton, Voltorb, Electrode, 

Staryu, Starmie, Ditto, Porygon, Mew, Unown, Celebi, 

Porygon2, Shedinja, Lunatown, Solrock, Darkrai, 

Baltoy, Claydol, Beldom, Metang, Metagross, 

Jirachi, Deoxys, Bronzor, Bronzong, Magnezone, 

Porygon-Z, Rotom, Uxie, Mesprit, Azelf, 

Phione, Manaphy, Victini, 

Klink, Klang, Klinklang, 

Cryogonal, Golett, Golurk, 

Keldeo, Meloetta, Genesect, Carbink, Poipole, 

Naganadel, Diancie, Hoopa, Volcanion, Minior, 

Delmise, Tapu Koko, Tapu Lele, Tapu Bulu, 

Tapu Fini, Nihilego, Guzzlord, Kartana, Buzzwole, 

Pheromosa, Xurkitree, Celesteela, Necrozma, Magearna, 

Marshadow, Blacephalon, and finally Zeraora. 

All the legendary Pokémon like these are not Males and Females. 

Which is why legendary Pokémon are genderless.