I have registeel now. Going for Regice.
I have a 3 questions:
1)should I allow my regi`s to learn zap cannon/lock-on/hyper beam?
Zap cannon: NO.
Lock-on: NO. Lock-on ensures that the next hit will hit. A Lock-on/Zap Cannon combo is possible, but it takes you two turns to do 100 damage. Even spark is stronger. NO.
Hyper Beam: NO. never use two turn damaging moves.
Zap cannon is powerful but its accuracy is 50.
Lock-on I dont know what that does
Hyper Beam is bad if your pokes attack is low
2)My regirocks nature is Docile, is that good?
No, but it can work. You should usually go for natures that boost your desired stats, but this one doesn't lower any good stats (any stats at all actually) so ingame, it works.
3)My registeels nature is Jolly,is that good?
Nope, not really, thinking that it boosts speed and you're prolly gonna use Curse, but it doesn't lower anything important, so it can work.