And CAP26's success hinges on both its ability to take hits as well as dish them out. Yes, Steel is a bad offensive typing. But Psychic is a bad defensive typing, and it's easier to complement a poor offensive STAB with a secondary typing than it is to shore up Psychic's defensive flaws.
I'm not sure how this conclusion was drawn, but I definitely disagree with it. I think it is actually easier to complement Psychic's defensive capabilities than to complement Steel's offensive ones. Future Sight is inherently an offensive move, and the whole point of using it gain an offensive advantage later in the match by limiting the opponent's switch-ins. Thus, starting out with an already very strong offensive type allows more flexibility in the typing stage as there are fewer holes that need to be patched up. Defensively, the three types that would need to be addressed (chiefly Dark due to Pursuit, but also Ghost and Bug) have a good bit of variety in how they can be complemented.
Psychic Defensive Coverage
vs Bug:
Fairy,
Fighting, Fire, Flying, Ghost, Poison, Steel
vs Dark:
Dark,
Fairy,
Fighting
vs Ghost:
Dark, Normal (0x)
(Bold indicates something that resists multiple)
Examples: Dark, Fairy, and Fighting as secondary types all help our Psychic-type against Pursuit from Weavile and Tyranitar, as well as being able to take a Knock Off if it's worth it in the long run. Dark and Normal help stop Ghost-types, namely Necturna and Pajantom. Finally, Fairy, Fighting, FIre, and the rest of Bug's many resistances are mostly useful for U-turns from non-STAB users (which should be common due to the mon naturally causing a lot of switches), because there are not too many Bug-types that use STAB apart from U-turn (Aurumoth is an example).
Of course, this is all assuming we decide to go with a type that complements Psychic defensively, rather than offensively. Contrast this with Steel's offensive coverage:
Steel Offensive Coverage
vs Electric:
Ground
vs Fire:
Ground, Rock, Water
vs Steel: Fire, Fighting,
Ground
vs Water: Grass, Electric
Examples: Ground coverage helps vs Crucibelle, Heatran, Volkraken, and Krilowatt, three of which 4x resist Doom Desire. Hitting Fire super-effectively is most useful for Heatran and Volkraken. Covering Steel and Water is important to hit a multitude of threats, although it is hard to cover most Steel types offensively (Kitsunoh / Heatran / Celesteela are immune to each type individually), but trying doesn't hurt considering how commonplace Pokemon like Heatran, Celesteela, Magearna, and Ferrothorn are. Waters are also fairly common: the main target is Arghonaut, but Krilowatt and Volkraken are also important.
And you'll see that the best type that synergizes with it offensively is Ground, which of course leaves you vulnerable to Pokemon such as Celesteela and Zapdos. With all that being said, I'd like to emphasize that I am not trying to prioritize one type here. Rather, I am trying to display why I think it would be much easier to support Psychic's inherent defensive flaws rather than Steel's offensive ones. This also goes with what I was saying previously: Future Sight / Doom Desire are moves designed for offensive momentum, and the ways that Psychic offensive coverage can benefit off of Psychic's already strong offensive prowess allow for typing suggestions both offensively and defensively, while I think Steel can plausibly only pick something that helps it offensively (otherwise Doom Desire becomes much less threatening). Take a look at Psychic's offensive coverage here:
Psychic Offensive Coverage
vs Psychic:
Bug, Dark, Ghost
vs Steel: Fire,
Fighting, Ground
vs Dark (0x):
Bug, Fairy,
Fighting
Examples: Trying to hit Dark-types such as Weavile and Tyranitar on the switch which could otherwise Pursuit-trap you is critical. Fighting is obviously a key type that does this (hitting both 4x SE) but Bug and Fairy both do a fine job. Steel-types are also very widespread and although they usually cannot threaten you in the immediate way that Pursuit-trappers can, covering them universally is a near-impossible task due to the Kitsunoh / Heatran / Celesteela core that I mentioned previously. Other Psychics such as Mega Lati@s, Tapu Lele, and Aurumoth that could otherwise come into a Future Sight without much trouble is another coverage option; however I don't think it is as crucial as covering the other two.
One, notice that Psychic has one less type to deal with then Steel does. Two, also notice that many of the types that could theoretically help Psychic out offensively could
also support it defensively (Fighting, Fairy, Dark, Ghost). Again, we can contrast this with Steel:
Steel Defensive Coverage
vs Fire: Dragon, Fire, Rock, Water
vs Fighting:
Bug, Fairy,
Flying, Poison, Psychic
vs Ground:
Bug, Grass,
Flying (0x)
Examples: Fire-types like Heatran, Volkraken, and Smokomodo are very threatening to Steel-types, especially due to their secondary STAB or coverage options. Fighting-types like Mega Medicham, Hawlucha, and Tomohawk, are a little easier to cover because of the many resistances towards them. Also, Ground-types such as Colossoil and Landorus-Therian are a bit harder to cover due to both resistances being weak to Fire and Steel / Flying facing competition with Celesteela and Cawmodore.
None of the overlap here (Fire, Rock, Water, Grass) is bolded on either side, while Psychic has one bolded on both sides (Fighting), two on one side (Dark, Fairy), and one normal (Ghost). Again, I'm not aiming to suggest any type for CAP 26 atm, and I still don't really have a preference on any particular type for either a FS or DD user; I doubt I will until the typing stage. But I think this is pretty good evidence in favor of Psychic's defensive presence being easier to support, at least in the area of secondary typings, than Steel's offensive presence.
Lastly, we do want this Pokemon to use the move. And because of the BP difference between DD/FS and their next most powerful options, Doom Desire will be easier to "force" our CAP to use. I don't like this argument, but I have to admit it's valid.
I've also talked about this on Discord but I think is a really unhealthy way to think about this concept; and I also don't agree that it's valid. If we make it so that, as talked about in Discord, our mon doesn't have Flash Cannon at all and only has Doom Desire, that could severely hurt CAP 26's viability. And it has been argued that "it fulfills the concept as long as it uses Doom Desire" which is true, I guess, but sacrificing viability in exchange for using Doom Desire is not what we should aim for. We should strive to use a mon that
wants to use FS / DD, not one that begrudgingly uses it due to it being their best Steel STAB. Luckily, we have two good examples of Pokemon that use Future Sight that also learn Psychic (which I'm sure no one is suggesting on leaving out of a FS user's movepool): Slowking and Slowbro. We should try to use these Pokemon as models to understand more what motivates a Pokemon to use Future Sight rather than Psychic, and work off of there. If we think that "by forcing the CAP to use FS / DD, we have succeeded in the concept" is valid logic, then we could literally make a mon that just knows Doom Desire and call it a day. Obviously, this is an extreme situation, but it works off of the logic. This is similar to a (I hope) joke Birkal made in Discord earlier today when he said:
[4:09 PM] Birkal: Give it two abilities, like regenerator and defeatist. Then, make it so the mon literally has to know DD in order to get regen. As like a required event move or something
Gg
Technically, Birkal's idea here
would fulfill the concept: The CAP would almost definitely run Doom Desire, but also have its options limited severely if it ever wanted to run, say, a Choice item; it would pretty much be working with three slots. This is why I believe we should
incentive the use of a delayed move, but don't "force it". I do think this concept is very limited in terms of how we can work with it (concerns Birkal has expressed as well); however, now that we have it, I think we should use this thread to explore what causes mons like Slowking to use Future Sight over Psychic, and apply these ideas to our own CAP, rather than try to severely restrict its options to the point of it having little flexibility. Even if our CAP used Future Sight or Doom Desire on one set, but decided to forgo it on another, I would still consider it a success because of how hard these moves are to work with.