Just to give you an idea, on how far ahead they are. In The Japanese show, The Voice Actor for Professor Oak, Samson Oak and the Narrator passed away midway though SM run, they had enough episodes in the bag to last a few months after his death.. Even then the following Movie was voiced by him. I should point out that the VA is usually the step between Script and Animation..
A minor nitpick, but anime follows a different production sequence than animation from any other country in that the animation usually comes first, then the voice acting. The voice actors watch the animated scene played on a screen in front of them to get an idea of how and when they'll say their lines, and after they get the hang of it, they do their voice acting in time with the scene played again. (There are a few anime directors who do voice first, then animation, like Mamoru Hosoda and Satoshi Kon, but to my knowledge, the Pokémon TV anime has never had any of their involvement, and the actors themselves are very used to the process I described above and might get tripped up not having a screen playing the scene to watch, and those directors mostly only do movies where they can hire outside of the usuals.)
But that really means the lead time for the Pokémon anime is even further back than it might seem, as voice acting is one of the LAST steps to an anime (after that being sound mixing, cleanup, and distribution). More so in that the Pokémon anime is almost certainly produced in a "cascade" fashion, where every department is working at the same time, but on different episodes depending on how far into the process their department is. It's the only reasonable way I know of where a new episode can come out every week without a break. (This cascade process is how, for instance, you can have 26 episodes of
The Simpsons every year, yet each episode takes about 8 months to go from script to ready-to-air.) If it's made in this way, the last episode to have Professor Oak's voice actor performing may have had its finalized script written several months to a year prior.
Does anyone know if that hidden ability item will work on legendary pokemon
I see no reason why it wouldn't, as long as the Legendary Pokémon itself has a Hidden Ability. Most don't, but a few do, such as Heatran and Suicune and Pals.
Fair enough. The ones specifically with 'Acid' in their name does make sense. The ones referencing Smog and such would work too like you said. That would give us:
Acid
Acid Spray
Smog
Clear Smog
Acid Downpour (though that's G-Max, so it would be its special G-Max effect and suddenly effective against Steel so it may be a bit much)
Corrosive Gas (didn't even know this was a move until I looked up what attacks could have the 'good against steel' property we're hypothesizing)
Though that's it....wouldn't really call Venoshock worthy since that's clearly just a move that intensifies poison (hence why it does more damage if target's already poisoned).
Something for Gen 9 to consider, I guess. A bit late to add attacks now lol.
I wasn't really too sure if Corrosive Gas would work against Steel-types, as I haven't actually tried it myself. That was the one to come to mind though.