Firstly,
bugmaniacbob's calculation below for a sun-boosted Fire Blast is wrong.
Code:
252 Timid Life Orb CAP 3 (Sun) Fire Blast
vs. 252/0 Bold Leftovers Blissey : 41.3% - 48.7%
We have a powerful Pokemon now with 131 base Special Attack.
It's important to remember this, and even more important to consider what that can do in sun. It's also important, however, to remember that it forfeits our Water-type immunity for a pseudo-resistance that hinges on our ability to maintain weather.
Let's look at some relevant calculations offensively. I will assume two sets, a Choice Scarf set that attempts to sweep and a Choice Specs set that attempts to wallbreak. First of all, note that Choice Scarf Heatran and Choice Scarf Landorus, the
most popular variants of those two Pokemon which threaten us still walk all over both sets once safely in.
Code:
252 Modest Choice Specs CAP 3 (Sun) Fire Blast
vs. 252/0 Bold Leftovers Blissey : 52.7% - 62.2%
vs. 0/4 Timid Choice Scarf Rotom-W : 94.6% - 111.6%
vs. 0/4 Timid Life Orb Starmie : 105.7% - 124.9%
vs. 252/0 Bold Leftovers Tentacruel : 56.9% - 67.3%
vs. 252/0 Adamant No-Multiscale Dragonite : 63% - 74.4%
vs. 252/0 Timid Latias : 53.3% - 62.6%
Ow. As far as a wallbreaker goes, CAP 3 is immensely powerful. Even the mighty Latias and Blissey are 2HKOed a majority of the time. Rotom-W and Starmie are OHKOed with and without SR, respectively. This is pretty damned powerful, indeed. Let's try it against its two best switch-ins, however:
Code:
252 Modest Choice Specs Pokemon Fire Blast
vs. 252/192 Sassy Leftovers Tyranitar (Sandstorm) : 20.3% - 24%
vs. 252/4 Bold Leftovers Politoed (Rain) : 21.1% - 25%
Amusing, at best. Now let's try Choice Scarf.
Code:
252 Timid Choice Scarf CAP 3 (Sun) Fire Blast
vs. 252/0 Bold Leftovers Blissey : 31.9% - 37.5%
vs. 0/4 Timid Choice Scarf Rotom-W : 57.3% - 67.6%
vs. 0/4 Timid Life Orb Starmie : 64.4% - 75.9%
vs. 252/0 Bold Leftovers Tentacruel : 34.6% - 40.7%
vs. 252/0 Adamant Leftovers Dragonite : 38.3% - 45.1%
vs. 252/0 Timid Leftovers Latias : 32.1% - 37.9%
I'll be pretty honest, Choice Scarf CAP 3 is going to be fairly bad. It can't beat any of the list of normal Fire-type switch-ins, it can't outspeed Heatran, it cannot outspeed +1 DNite, and err, it cannot outspeed +1 anything pretty much except like Scrafty and TTar.
Now let's do ourselves a favor and compare a Choice CAP 3 to Heatran, because that's really what it'll come down to in sun. I'll say this:
- CAP 3 is weak to Stealth Rock
- CAP 3 has far fewer switch-ins than Heatran
- CAP 3 is slower than Heatran
- CAP 3 is not as bulky as Heatran
- CAP 3 is negligibly more powerful than Heatran
- CAP 3 starts its own sun (Assuming Drought)
Thus,
CAP 3 is not as good as Heatran in the sun-wallbreaking role. The reality is, as I intended it to be with the stats, that CAP 3 without Dry Skin simply won't be getting as many switch-ins without investment in its defensive stats. It's too slow to do anything akin to what Infernape achieves, and too type-weak to achieve what Heatran manages. About the only way you'd be able to use CAP 3 as a wallbreaker is if you used it
alongside Ninetales, because quite frankly, Modest Specs CAP 3 will be dying really fast. That in itself isn't a terrible idea, but invites redundant weaknesses on your sun team, which typically doesn't end well.
--
As far as other abilities go, capefeather summed it up quite nicely.
Reality said:
Dry Skin is an amazing ability, and competitive secondary abilities need to be comparable to it or we may as well not have them.
This rules out a lot of suggestions thus far, namely Sheer Force, CompoundEyes, Rough Skin, Vital Spirit, and even Regenerator. I'm surprised that cape lists how good it will be, because quite frankly, without its Water-type immunity or pseudo-resistance from Drought, CAP 3 will be able to switch into a very small list of Pokemon in OU successfully. It's not
that bulky, and its typing leaves it with holes that basically every OU Pokemon except Scizor can capitalize on (And Scizor will just U-turn out to something that can threaten you). Regenerator is good on totally offensive and fast Pokemon because they can punch you and then run away, but CAP 3 is
slow. 76 isn't catching anything really, and will barely be forcing switches in the first place. CAP 3 will always use Dry Skin if given Regenerator.
Regenerator isn't even good enough on stall teams. Consider that
over three turns, Dry Skin in rain has healed CAP 3 more than Regenerator would have. That's not even a stretch because it will always get at least two turns (switch-in + opponent switch). What's more is that
if CAP 3 switches into a Water-type attack in rain, Dry Skin in one turn heals CAP 3 more than Regenerator would. Pack Protect and you can get four easily. Consider further that CAP 3 maintains an immunity to Water-type attacks with Dry Skin, which is countless times more valuable than anything Regenerator provides. Seriously, Regenerator simply cannot compare to Dry Skin on this Pokemon. It isn't even worth supporting.
The only ability I can think of with enough potency to match what Dry Skin achieves for this Pokemon is Drought.