As with all pokemon, how good they are is dependent on two things:
1. What you raise them to do
2. What they do
I prefer magnemite and voltorb
There are a few electric type Pokemon you can get in ruby and sapphire and emerald like Electrike you can find a lot of them in New Mauville you can find Magnemite and Voltorb. Other electric types you can get are Pikachu, Mareep.
some good electric Pokemon catches in RUBY/SAPPHIRE would be electrode, manectric and magneton (Electrode and Magneton are rare but Manectric is Uncommon) there is also voltorb, pikachu, magnemite, chinchou, lanturn e.t.c
Wattson the electric gym.
well i have ruby and sapphire and slugma is in that cave near the electric city
train dragon types
Ground type. They cannot be affected by electric-type moves.
There are three types of fishing rods in Pokemon Ruby. The Good Rod is found by talking to a fisherman on Route 118.
In Pokemon ruby, the first electric gym is wattson's gym, it is the third badge you obtain in the game. A good strategy to beat him is to bring along a ground type, or a fire type since he uses a Pokemon called magneton, which is Electric/Steel.
There are a few electric type Pokemon you can get in ruby and sapphire and emerald like Electrike you can find a lot of them in New Mauville you can find Magnemite and Voltorb. Other electric types you can get are Pikachu, Mareep.
some good electric Pokemon catches in RUBY/SAPPHIRE would be electrode, manectric and magneton (Electrode and Magneton are rare but Manectric is Uncommon) there is also voltorb, pikachu, magnemite, chinchou, lanturn e.t.c
Mauville
He uses electric Pokemon. His Pokemon differ between "ruby and sapphire" and "emerald".
Electrike can
Wattson the electric gym.
About any type can damage Steel-types, but its weaknesses are Fire, Ground, and Fighting-types. It's not recommended to fight them with Steel, Grass, Ice, Flying, Rock, Fairy, Psychic, Bug, and Dragon-types, for they are resistant to those types. It is completely immune to Poison-types.
well i have ruby and sapphire and slugma is in that cave near the electric city
They are Fire, Grass, Water, Rock, Fighting, Ghost, Psychic, Dark, Poison, Bug, Electric, Ground, Steel, Normal, Flying, and Dragon. What do you hope to gain from this?