
Originally Posted by
Gammawave
Swampert (Mild)
Rock Slide/Protect/Toxic
Earthquake
Surf
Ice Beam
as azeem said it, in-game opponents rarely switch.
Volcarona (Modest/Timid)
(Lum Berry)
Bug Buzz
Substitute
Quiver Dance
Fiery Dance
It's okay, though I prefer Giga Drain over Sub. Jolly is a bad Nature for it, since Jolly reduce SAtk.
Jellicent (Modest)
(Leftovers)
Scald
Will-O-Wisp
Taunt
Recover
It's okay, I guess. Maybe Shadow Ball over W-o-W, since Scald can inflict Burn anyway.
Hydreigon (Modest/Timid)
(Life Orb)
Dark Pulse
Fire Blast
Focus Blast
Draco Meteor
Dark Pulse for another STAB that's actually reliable, accuracy-wise. The other three moves already covers everything anyway. But if you want more reliable moves in terms of accuracy, replace Fire Blast with Flamethrower, Focus Blast with Surf, and Draco Meteor with Dragon Pulse.
Magnezone (Calm)
(Choice Specs)
Thunderbolt
Volt Switch
Flash Cannon
....where's the fourth move? XD Go with Signal Beam/Tri Attack/Hidden Power [anything not Electric/Steel/Poison] for the last move.
Excadrill (Jolly)
(Air Balloon)
Sword Dance
Earthquake
Rock Slide
Iron Head
Use the one with Mold Breaker ability (its hidden ability), outside a Sandstorm team MB is the preferred ability. Also, Timid reduce Attack. Go with Jolly instead. RS & EQ already covers almost everything anyway, so you can go with Iron Head as second STAB move.