Rendolf

Man you were able to beat Charlotte on your second try in your first playthrough? She is quite possibly the hardest gym leader out of all of them so good job for that

It's hard to say. I'm sure at least some fraction of them will be coming back but who knows. Depending on which routes you took there are also some other people in sorta similar scenarios, so we'll see.

Should be a visible Poke Ball. If you can't find that then the other way is on the 11th floor of the Department Store, but you don't get that until towards the end of Episode 18.

You can get one on Route 2, past the Celestinine Cascade.

Steel was my first too and I had a pretty easy time with it (Shade was a pain though, even with my Pawniard god roll)

It costs 3 heart scales to change natures, so make sure you have at least that many.

Good to hear!

Apparently if you hatch an Iggylbuff egg in the (upper) Peridot Ward then you can give that to her I think (Or at least I've heard that sort of thing about other returned Pokemon so I'd assume it works here, too).

One thing you'll definitely want is a Ninetales for its Drought ability, so be sure to find all the police officers and hope you get lucky with a Vulpix. If you don't get super lucky with a Vulpix then be sure to catch a Stunfisk once you get to Apophyll Beach, you'll need it for later. Torkoal also gets Drought so you can get one of those too, but it isn't available until much later in the game.

That's weird, I'm not sure why that would be the case. It should get it according to Bulbapedia.

Yeah I was gonna suggest going to your last backup if it wasn't too much of a hassle, glad it worked out. Just keep at the battles, you'll get there eventually, and just know that this one isn't the hardest gauntlet you'll have to face...

Obsidia Park, 20% chance any time of day

Sure thing

Well actually when I say Thunderbolt is available I mean that you can get it just before the last gym battle. So you might have to survive on Discharge for most of the game haha

Nope, sorry. Thunderbolt is available eventually, but since you specify Galvantula I'm guessing you intended it to work with Compound Eyes...