Help with defeating Zoe and Grizzbolt without Pals

Hey Everyone

I’ve been enjoying playing this 1.0 update with friends and decided to push myself with a single player game with an eggs only challenge where all my pals come from wild eggs and breeding and as we all know the egg incubator is unlocked by defeating zoe and grizzbolt. What is the best way to defeat these two with no pals?

And in in case someone asks about the lucky pals, I haven’t decided if they’re going to just be killed or catch and be forever in the palbox