Hey, so I know you’re an utter madman and would like to eliminate types from the chart. That sounds really unnecessary but. If you got to rebalance the type chart a bit, change some of the dynamics, what would you do? How will you help the poor ice types? Will you finally stop the steel types?
I think you’ve maybe misunderstood me, because to me these are two unrelated issues. I don’t think the 18-type chart is, in principle, impossible to balance (I do think that 900 Pokémon are, in principle, impossible to balance, but that’s another whole thing). I don’t want to cut down the number of types because I think it would make the game more balanced (I mean, it might, but I don’t think it’s the only or best way to do that, and it wouldn’t be enough on its own). I want to cut it down… as weird as this will sound, basically for aesthetic reasons – to whit, I think it’s an ugly, overcomplicated mess that doesn’t actually need to exist. Beautiful or elegant game mechanics, to me, are ones where complex gameplay and strategy arise from the interactions of simple rules and principles. The type chart means that Pokémon does this in reverse: the fundamental rules are complicated and counterintuitive, but the resulting gameplay is not particularly any more interesting than it would be using a greatly reduced system.
I will admit, having said all this, that (like many things) I say this stuff partly just to be contrary. I’m not even all that committed to it; I just want to force everyone to think about it. I mean, people talk all the time about what new types they’d want to add, from time to time people ask me to talk about types I’d like to add; so clearly no one thinks the type chart is sacred and can’t be changed. Why is it so much more uncomfortable to talk about getting rid of some of it; why is anyone bothered when I say that I think that might be a good idea? It’s an uncontroversial axiom of good design that you should leave out or trim down elements that are unnecessary or bloated, but after last year’s… invigorating discussions… about Sword and Shield, I get the impression that a good chunk of the Pokémon fan community is pretty strongly opposed to what I think is a fairly obvious principle. I’d like people to consider, when they talk about game design in Pokémon and all the cool ideas they want to add, whether there are also things they’d like to remove – because that can also improve a game.
Anyway, to the question you actually asked… whatever, Steel should have a lot of resistances but maybe it could do with one more weakness (Water?), Grass and Bug are comically shafted and shouldn’t be resisted by so many things (maybe lose Flying for Grass and Ghost for Bug), thematically I just think it would be really neat for Normal to be strong against Fairy (it should really be strong against something)… and at that point I guess you should probably stop and playtest for a bit before tinkering any further. Something like that.