I've got octillery and oranguru for her to use and pretty much any trainer, so any ideas on how to set up would be greatly appreciated. I'm not very knowledgeable about this!
Well, that's what you're here for.
Okay. From my experience, you need to get your hands on:
• Regular Volcanion from Steam Seige
• Most variants play Scorched Earth, but Altar of the Sunne could be a decent swap-in depending on what the meta has in store.
• I, personally, would choose to play Octillery, but if you run out of space, by all means use Oranguru.
• Ho-oh and Salazzle aren't really in the popular decklists because they are quite situational. Only tech them in if you have space.
• Turtonator GX is usually a good option. An FFB (Fighting Fury Belt) and two steam ups is able to OHKO a Gardevoir GX.
• 13-15 fire energy, you can fine-tune that number while playtesting.
• If you don't want to have to buy "Wallet Buster" Tapu Lele GX, Random Reciever is by far the best replacement.
• Some form of getting Energy out of the discard pile, preferably with Energy Retreival and Fisherman. (Turtonator GX's only drawback.)
• Side note: Turtonator's GX attack can be used at the beginning of the game to get an early lead (if you've discarded 5 fire energy)
or near the end to get back on your feet after you're "burned" out. (Get it?... Burned? Fire types? Okay I'll stop.)
I think that's pretty much it. I haven't actually played Volcanion, so if someone says something that contradicts what I say, use their advice.
Best of luck to you and your daughter.
And, come to think of it:
Welcome to Pokébeach. Lord Goomy, at your service.