Question

How can i make sure that the axews i breed all hatch with the ability rivalry?

Answer 1

You can't, its all luck, but you can get more chance if the mother is any of axew ecolutionary line and has rivalry (THE MOM)

Comments

Btw, rivalry is kinda unreliabe, get mol breaker :b

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The way i'm training my dragon i don't need mold breaker,but rivalry can give a little boost.
plus i'm teaching attract just incase.

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the boost is nice but the decrease on the other hand........

Answer 2

Get a female in the axew line with the ability rivalry, and give it an everstone while breeding, this wil lguarante the ability on the egg.