Baton Pass
Baton Pass provides an alternative to U-turn, which i perosnally prefer. The main reason for my preferance of Baton Pass is that it doesn't break Heatran's Balloon, allowing Heatran to deal with Malaconda + Dugtrio easier and checking the core a bit longer. So if Baton Pass will be allowed i would only like to have Baton Pass on Malaconda's movepool.
The reason that some people don't want to allow Baton Pass is that it will have the potential to turn Malaconda into a very good boost passer. Deck Knight showcased how Malaconda can get a +3 boost on whichever stat it wants with the use of Protect + Substitute, or even three +2 random boosts with Starf Berry. This strategy will require three moves (Baton Pass + Substitute + Protect) and will be of one-time use, making Malaconda a supporter for another Pokemon's sweep. While it is true that those sets could be used, there are certain reasons why the CAP won't become a good dedicated Baton Passer:
1. The offensive Pokemon that can be used on sun teams are usually Fire or Grass types, such as Venusaur, Victini, Volcarona, and Darmanitan. Those Pokemon can all get OHKOed by Dragon-types on the switch, a group of Pokemon that already troubles Sun teams. Dragon Dance Dragonite, Substitute Kyurem-B, SubSD Garchomp, and Substitute Hydreigon can all abuse the fuck out of Malaconda, setting up as Malaconda tries to get into Berry activation range and easily OHKOing the Pokemon that the CAP will pass the boosts to.
2. Many of the counters to Malaconda are phazers. Heatran, Skarmory, D-Tail Kyurem, and physically defensive Hippowdon (yeah it avoids the 2HKO from Power Whip and can stall out Malaconda by spamming Slack Off as sand slowly kills the CAP) all carry phazing moves and all of those Pokemon are extremely common Pokemon in the metagame, lowering the viability of a potential SubPass set.
3. There are several setup sweepers other than Dragon types that trouble the SubPass set.
Swords Dance Breloom freely switches into the CAP, uses Swords Dance, and then breaks the CAP's Sub with Bullet Seed, preventing the CAP from getting into Berry activation range and Baton Passing its boosts or Sub succesfully.
SubDD Gyarados switches into Malaconda as it uses Substitute, lowers its Attack with Intimidate (which will be Baton Passed later), and then can procceed to stack Dragon Dances or use Substitute. If the CAP uses Crunch (remember it only has room for one attack) it can't even break Gyarados's Sub after Intimidate. The CAP has the option to use Baton Pass as Gyarados uses the first Dragon Dance, to bring in Venusaur safely (no Fire Pokemon would want to switch into Gyarados, even in sun) or just Baton Pass to a defensive Pokemon that can take care of Gyarados (Ninetales, Forretress, and Donphan can check Gyarados, but not for long). Or it can straight up attack in order to break Gyarados's Sub, which will only work if it has Payback (Crunch doesn't break the Sub, and with Power Whip SubCM Latias sets all over Malaconda's face). Even if it predicts right and breaks Gyarados's Sub, Gyarados has plenty turns to predict correctly and either setup a Sub or a DD, leaving Malaconda on a tight spot.
Swords Dance Scizor walls Malaconda and can set-up on Malaconda's face, leaving as the only option to Malaconda to Baton Pass to a teammate, while Scizor breaks the Sub in the proccess.
SD Lucario is in a similar boat, except that it is even more threatening to sun teams than Scizor. As i said earlier the CAP will most likely be forced to use a Dark move otherwise the Sun team will auto-lose to SubCM Latias, which means that
SD Terrakion and
Encore Politoed will be huge raodblocks for the CAP as well (Politoed comes in as the CAP uses Sub, then Politoed Encores the Sub). The important common trait of all those sweepers (except for Politoed) is that they can all greatly treaten sun teams after they set-up, making SubPass Malaconda a liability.
4. The CAP will face competition with other dedicated boost passers. Mew, Gorebyss, Huntail, Gliscor, and Smeargle will all give to Malaconda competition, and each of them has its own unique advanatges over Malaconda.
5. Sun teams don't commonly use such strategies. I already mentioned some Pokemon that use those strategies in OU, and none of them is commonly used in sun teams. This is a strong indicator that dedicated Baton Passers don't work well in sun teams, especially when they have redundant typing with sun's main sweeper, Venusaur.
Allow Baton Pass.
Glare / Stun Spore / Will-o-Wisp / Sleeping moves
All those moves offer nothing new against the Pokemon that we want to beat that we don't already have, and only serve as a way to screw up our counters. Why have Glare to cripple dangerous setup sweepers such as Landorus and Garchomp when Dragon-Tail and Ice Fang do the same thing without messing with our list of counters? Those moves bring nothing positive to the table and plenty of negatives, so
disallow all status moves other than Toxic.
Whirlwind / Roar
Whirlwind and Roar both serve as alternatives to Dragon Tail, if one prefers reliability and phazing through Subs over the added damage and the ability to phaze Magic Bounce Pokemon. There is nothing wrong with allowing those moves, so
allow Whirlwind / Roar.
Detect / Protect
DLC said:
No point in not allowing these. Detect and Protect are only useful in conjunction with Leech Seed, and even then it's a stretch to include both moves on the same set because of the 4mss Malaconda has. However, a set of Leech Seed, Protect, and two STABs turns Malaconda into a incredibly annoying stall tank that can shut down virtually any Special attacker. Protect is not a useful move unless used in tandem with Leech Seed, but turns Malaconda into a Heatran slayer with Leech Seed. Fortunately, Leech Seed is a disallowed move which relegates Protect and Detect to marginal roles. Allow Protect/Detect.
Agility / Autotomize / Flame Charge / Rock Polish
Flame Charge is obviously anti-concept as it alows the CAP to get past some of its counters and does nothing related to the CAP's role. All the other boosting moves would be pretty bad too i think. Every single Pokemon that DLC mentioned in his post can be beaten with the right set (a LumRest set with max HP / max SpD+ and Payback can beat all those Pokemon, and no i don't consider crits a serious argument) so i don't see the need for those moves. The biggest problem with those moves is that they could turn the CAP into a sweepr, something that would derail the CAP from its intended role. A set with Power Whip / Crunch or Sucker Punch / Sub / Agility with max Atk / max Spe and Liechi Berry could be a decent sweeper after priority users are gone. Why allow this possibility when those moves bring nothing notably positive to the CAP?
Disallow Agility / Autotomize / Flame Charge / Rock Polish.
Will get to the remaining moves later...