First off, questions of this nature should be asked in the Simple Questions thread that is stickied at the top.
Nidoking only learns learns two moves. Thrash (Lv22-FRLG, Lv23-RSE) and Megahorn (Lv43). Like all Pokes that evolve with a stone, you need to make sure that you have all the other moves you want BEFORE evolving your Nidorino. Granted, its other best moves are TMs, but you get the idea.
An all-Electric team isn't smart since a Swampert can come in and destroy your entire team with a STAB Earthquake and there is VERY little that you can do about it. Anyways, here you go:
Raikou
- Calm Mind
- Crunch
- Reflect
- Thunder/Thunderbolt
The "Dog" should be your front-runner because the first thing you are going to do is Reflect and Raikou has the speed to pull it off most of the time. Too bad Zappy or Electrode cannot learn it, because they are faster than Raikou. Abuse CM and let Crunch and Thunder/TB wreek havoc. I suggest using Thunder if you are going to have a Poke on your team with Rain Dance. Otherwise, stick with TB.
Zapdos
- Drill Peck
- Rest
- Sleep Talk/Light Screen/Thunder Wave
- Thunderbolt
Switch in against potential EQers. DP for Bug/Grass/Fighting problems. Restalk is preferred, but you can use LS instead to help protect against the inevitable Ice Beam. TW is also an option to get your opponent's statused and allowing you to strike first. Zappy and Raikou should be hit and run Pokes, unless your opponent allows you to set up a few CMs on Raikou. Then you can sweep away.
Lanturn
- Ice Beam
- Surf
- Thunder
- Rest/Toxic
This is your tank. The attacks are not that great, note the Thunder over TB, but its defenses certainly help. I would suggest Chestorest, but Toxic is VERY useful.
Electabuzz
- Cross Chop
- Fire Punch
- Ice Punch
- Psychic/Thunderbolt/Thunder
This is your utility Poke. VERY versatile. CC for Dark/Ice/Normal/Rock, FP for Bug/Grass/Steel, IP for Dragon/Flying/Grass/Ground, and Psychic for Fighting/Poison. Psychic can also be replaced by TB/Thunder.
Magneton
- Metal Sound/Reflect
- Substitute/Rain Dance
- Thunderbolt/Thunder
- Toxic
Your other Reflect user. Be careful with Maggie though, since it has a 4x weakness to Ground. Use MS if you can, but having a second Reflect user will prove beneficial. I suggest Sub over RD, but both have their advantages. Toxic to help take down opponents.
Electrode
- Explosion
- Light Screen
- Thunder
- Thunder Wave
The last slot depends on what you want. Personally, I think a lightning-fast (pun intended) Explosion will be most useful, since Electrode will almost always go first, allowing you to take out a threat. TW should be used, especially if Zappy doesn't have it. With Electrode's speed (second highest non-uber speed in the game), you can status your opponent once or twice and then go boom on them. LS is another option.
You can also go with a BP Jolteon (Agility/Baton Pass/Substitute/Thunderbolt) or even a stronger Ampharos that can SubPunch or even Reflect/LS in the last slot.
Good luck.
Edit: a little late, but hopefully still helpful