By leveling up.
Level 30.
Voltorb evolves into Electrode, starting at level 30.
Volbeat doesn't evolve in any Pokemon game.
It evolves at level 30
level 30
lol lv.17
aipom does not evolve inpokemon emerald
Electrode does not evolve
No Sableye does not evolve.
No, Vileplume does not evolve in Pokémon Emerald.
Magcargo does not evolve in Pokémon Emerald.
Poochyena is a dark type of Pokemon. In Pokemon Emerald it will evolve if you raise it up to level 18.