It really depends on which dragon you want to get. One way is to buy the epic breeding island. If you breed on it, you'll have a higher chance of getting rare dragons.
Nope.
No, they only have to be adults. However, the higher the level of the dragons being bred, the higher the chance of the outcome will be a rare dragon.
What I did to get more visitors was get more dragons and rare dragons like moon, sun, and rainbow. Or decorate your park better! ^-^
You simply just have to buy or breed all hybrid dragons and regular ones :)
It really depends on what you breed it with. That will have a huge effect on the outcome. A bone dragon has both fire and earth elements, so variations of those are among the possibilities.
You have to breed one; though it will be very hard.
It will be anything that makes up those elements and might be a rare one like a moon or rainbow.
Yes, all the dragons in DragonVale are breedable without spending cash. Some of them are pretty rare, and they take a little time. I have managed to get all of them without purchasing any of them. Your best bet is to look up the best combinations to breed each type of dragon before you start on them. Also, if you do the arena everyday, you will start to collect gems from that.
The most common results of crystal + water are:CrystalMudQuakeCurrentRiverPlasmaSome very rare results include:OpalSilver OlympusAmethystGeodeMotleyLunar EclipseBronze Olympus
Yes it is very rare
dragons are rare but some can be found.
you need cool fire +soccer dragon =wind or any legendary dragons or you can breed any of two hybrids/rare dragons