Alright, so here's how the gym battle went down:

Amaura was KO'd after only a few hts, whereas Tyrunt nearly took out Johnny. Thankfully, I swapped in Tub and then proceeded to defeat the Tyrunt.

It was glorious. And much, much easier than I expected.

Alright, I won't make much more progress today, and I won't say what I did before challenging the gym, either.