Scald should not be mandatory on this Pokemon's movepool. In-fact, Scald should be entirely absent from CAP 3's movepool. Scald should be disallowed.
Water-type coverage arguably holds no merits for CAP 3 outside getting pseudo-STAB in rain. It achieves very little, too, besides making it very, very difficult for almost all of CAP 3's threats to switch in
. Seriously, let's look: Terrakion, Landorus, Dugtrio, and Gliscor are all OHKOed by CAP 3 getting pseudo-Water STAB, and Heatran is cleanly 2HKOed. Tyranitar survives by a lot, but let's look at calcs for everything else, which, may I remind you, makes up almost the entirety of our threats list
Let's keep in mind that these calculations are with Leftovers as CAP 3's item. That means that these numbers also
represent Choice Scarf numbers... And you don't want to see what the numbers look like with a damage-boosting item. (Trust me)
252 Modest Leftovers CAP 3 (80bp Water Special)
- vs. 252/0 Impish Gliscor: 103.4% - 122%
- vs. Jolly Landorus: 109.7% - 129.2% (Not even Naive!)
- vs. 4/0 Jolly Terrakion: 109.4% - 128.8%
- vs. 4/0 Jolly Focus Sash Dugtrio: 182.1% - 215.1% (30% to OHKO through Focus Sash and without hazards thanks to Scald's burn)
- vs. 248/252 Calm Leftovers Heatran: 52.5% - 61.8% (SpD Bulky)
- vs. 0/4 Modest Air Balloon Heatran: 84.8% - 100.3% (Stealth Rock or one layer of Spikes if no balloon does this in for good)
So, uh, yeah! Everything that is supposed to threaten CAP 3 cannot switch into it safely! The only 'safe' switch-in is them thar Tyranitar (unsurprisingly). Now there's of course all of those arguments about 'prediction' and what-not, since if CAP 3 doesn't catch them on the switch they win, but this is all irrelevant. Ask yourself this: "Why do you want CAP 3 to have Scald?" There is no good answer competitively besides "To defeat as many of its supposed threats as possible".. and that is unacceptable. Let CAP 3 be threatened by these Pokemon; don't allow it to run through them with but a single move's coverage.
I know Scald's cool for flavor, but this is a competitive project. Please, think of the children.
...P.S. Acid Spray isn't
an attacking move
. Sorry, Deck.
You've got some fancy voodoo in your post, but your post even confirms by its very nature that you're using Acid Spray as a supporting move, not
as an attacking move.