I suggest the creation of a new Space type in order to better define the Psychic type and diversify the Pokedex.

Space type should be super effective against Grass, Bug, Dragon and Fairy(because plants, bugs, dragons and fairies can't live in space), Fire(because there's no oxygen in space) and Ice(Because there are stars in space and stars are hot which melts ice).

It should be resistant to Fire(You can't burn space) and Ghost(There are no ghosts in space) and should be immune to Fighting(You can't punch space), Ground and Rock(There's no ground in space).
It's weaknesses should be Poison(Creatures from space would be weak to Earth diseases and poisons) and Steel(Metal is the only thing that can survive in space).

I believe that many different pokemon could benefit from becoming space type. The Clefairy line should be Fairy/Space, Elgyem would be Space/Psychic, and pokemon such as Deoxys, Cresselia, Xatu, Starmie, Solrock, Lunatone, Metagross and Bronzong would become Space type instead of Psychic type.

The addition of Space type could only be a good thing for Pokemon, don't you agree?