Apologies for the flavor. Let me try again without it.
Endure: Here’s one that wasn’t mentioned before. Malaconda could use Endure to great effect in conjunction either Custap Berry or Liechi Berry and Harvest, making for some very amusing late game cleaning flavor sets. By clinging to life with Endure, while under 25% HP and Custap Berry, any of Malaconda’s subsequent moves would have increased priority! With a Liechi Berry, Malaconda’s attack will be boosted a stage each remaining turn it manages to stay alive, which in conjuction with priority moves like Sucker Punch and/or Extremespeed could be frustrating to kill as well.
Assuming you only had 1 HP left. Either of these sets would easily be foiled by a multitude of things like sand/hail, faster priority, Pranksters, substitutes or status. Allow Endure.
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Stat-altering moves:
Boosting moves work against our concept of a defensive pivot. I think the most tempting ones are Coil and Growth. Coil would inevitably lead to a set consisting of Harvest, Lum Berry, Rest, Coil, Power Whip and Sucker Punch and would be more than viable in the rain; without a fire weakness, Malaconda would become very difficult to take down after a single boost. Growth, while despite being tied to sun, leads to attacking sets, and with priority moves bypassing its low speed, Growth Malaconda could be very lethal as well. Furthermore, if Baton Pass is allowed, this would also make Malaconda a very bulky boost passer, which I don’t think we want either. Furthermore, I am against anything that let's Malaconda boost it's defense, like Iron Defense or Stockpile, as it could be become broken with a boosted defense stat. Unless we see some very compelling arugments otherwise, I say Disallow Stat-altering moves.
Clear Smog / Haze: I feel these are unnecessary, as we gave him Dragon Tail, and these moves are inferior to good ole fashioned phasing moves. But I don’t see why he couldn’t have them. I’m indifferent to these.
Status moves:
Aromatherapy / Heal Bell / Refresh: Hells yeah. Malaconda would make a damn good cleric, not unlike Blissey or Celebi. With the great synergy of Intimidate Gyarados/Tentacruel to absorb fire, fighting and bug attacks, as well as Rest on either of them, you could potentially make one awesome defensive core. Furthermore, the possibility of Rest Ninetales definitely lessens its debilitating weakness to stealth rock considerably. Allow cleric moves.
Confuse Ray / Teeter Dance: Sure. Why not? Parafusion is fun. Allow confusion moves.
Glare: I decided early on, Glare on Malaconda was going to be my baby.
Glare is the best paralysis move in the game, and probably the best move Malaconda could have in terms of total team support, besides Rapid Spin. This move would give Malaconda a great niche at stunning the ground types and electric Volt Absorbers immune to Thunder Wave it is supposed to counter, and ease its slow speed stat considerably. Paralyzing Jolteon and Landorous is something not many mons can do. It would also synergize well with Dragon Tail and other phasing moves in a parashuffle set. Furthermore, most stunners fear Xatu and Espeon hopping in and bouncing back its paralysis, but not Malaconda. With Lum Berry, it’d be immune to its own rebounded status, and with access to dark STABs, could easily kill the Magic Bouncers. It also would really inhibit set up sweepers setting up in front of it, unless you happen to be the almighty Swords Dance Scizor, Conkedurr, Lum variants of Volcorona or Dragonite, or more commonly than all of these put together, a fast substitute user.
Glare also doesn’t really damage Malaconda’s tired and true counters that badly. Assuming its orb is already active, Toxic Heal Breloom is immune to Glare. Techniloom doesn’t really care about stunning since it has Mach Punch, and the same is true with Scizor, who is already slow, and often relies on Bullet Punch for quick kills. Conkledurr would actually love to be stunned, boosting its attack power with guts. Glare could potentially screw over a lot of fire types however, like Infernape and Scarftran. Allow Glare.
Lovely Kiss / Sleep Powder / Spore/Yawn: One thing Rain and Sand teams have always had over Sun is that they are more typical to use Parasect, Breloom and Amoongus, the Spore users. Typically, when a Sun team wants to use a grass type, they use something with a sun ability, and thus they need to use the less accurate Sleep Powder, and I think it should stay that way. At first, I thinking with the idea that if Malaconda got Spore, that would free up a move slot on Venusaur to have Earthquake more consistently to get past fire, and would eliminate Dugtrio as a necessity, and I still think that’s a discussion worth having. But my fear is that if Malaconda does get Spore, that basically allows Malaconda to sleep one of its few counters on the switch and bypass them completely. Hypnosis could provide a decent flavor alternative, given its low accuracy. For right now, I don’t support Malaconda getting Spore, as sun teams are over saturated with sleep moves already, but we should definitely discuss the merit/dangers of sleeping moves on Malaconda. Disallow sleep moves.
Will-O-Wisp:
No. Malaconda’s low physical defense its Achilles heel. Will-O-Wisp makes it waaay to hard to kill. Will-O-Wisping switch ins like Breloom and Scizor and Toxicroak makes them non-switch ins. Finally, Ninetales often runs Will-O-Wisp anyway. It’s redundant on a sun team. Disallow Will-O-Wisp.
Move limiters:
Block / Mean Look / Spider Web: Don’t see why these help, unless Baton Passing Mean Look comes back in Gen 6. Indifferent.
Encore: I’m indifferent. Deter setup? There are plenty of better moves including phasing and Glare.
Taunt: He’s kinda slow to make good use of it. I’m indifferent.
Disable/Torment:
Sub Disable Gengar and Tormentran Malaconda is not, and never will be. The beauty of Tormentran is his few weaknesses. Malaconda has many more. Breloom, Volcorona, Ice Punch Toxicroak and Superpower Scizor all continue to hit Malaconda for supereffective damage even when Tormented. Torment would be more of an annoyance than really screwing its counters. Disallow Disable/Torment.
Field effects:
Gravity: Could be interesting in conjunction with Dugtrio. Maybe. I’m indifferent
Rain Dance: No Rain synergy. Disallow Rain Dance.
Sunny Day: Definitely. Allows him to back up Ninetales with weather support. Allow Sunny Day.
Trick Room: Eh, I think Xatu or Espeon or Chandelure would be better at setting up Trick Room for sun.
Hazards:
Rapid Spin: A given. There’s no better move for sun support than Rapid Spin, as Ninetales is weak to it. Malaconda will be very difficult to spin block with ghost types, given its STAB dark type moves. Personally I think Malaconda will still be inferior to Espeon and Xatu in terms of total hazard defense, since stopping to use Rapid Spin wastes valuable momentum. Still. Allow Rapid Spin.
Spikes/Toxic Spikes: Who’s got time for these on a sun team? Don’t care.
Stealth Rock: I guess the only consistent Stealth Rockers on sun teams are Heatran and Dugtrio. Malaconda having it could be useful. Allow Stealth Rock.
Other:
Baton Pass: Malaconda’s a pivot poke, so Baton Pass would go great on him and give him all sorts of versatility supporting his team. Being used in conjuction with other moves, Malaconda could use Glare on a switch in (who does not have priority or U-Turn), and then outspeed its opponent and use substitute. In conjuction with Sitrus berry, you could actually continue to use Substitute indefinitely until your opponent is stunned! This would make Malaconda a Sub Passer to rival Vaporeon and Gliscor. Easy Taunt bait though. Allow Baton Pass.
Destiny Bond: Custap Berry suicide Malaconda could be a thing, I guess. Allow Destiny Bond.
Detect / Protect: Well duh. Who doesn’t get Protect? Subseed needs it. Allow Detect/Protect.
Healing Wish
Ingrain: I’d like to see Ingrain as an option. Ingrain Pass Smeargle is a nice niche Malaconda could duplicate, becoming a link in Baton Pass chains. Allow Ingrain.
Knock Off: This is an underrated move. Nothing is sweeter than knocking away Chansey or Porygon 2’s Evolite. Allow Knock Off.
Light Screen/ Reflect: Eh, Xatu and Espeon both do these better for sun. Disallow screens.
Magic Coat: Sure. Rebound dem rocks and Taunt. Allow Magic Coat.
Magnet Rise: Eh, I guess you could pass it to fire types. I don’t feel overly passionate about it though.
Memento: Helps set up sweepers. Allow Memento.
Perish Song / Roar / Whirlwind: I’d be down for one of these. I dislike Dragon Tail. Things behind subs don’t care about DT, especially steel types. Allow traditional phasing moves.
Switcheroo / Trick: Well, it encourages a Choice Band set, which everyone seems dead set against but most of Malaconda’s switch-ins are physical attackers anyway. So you give a Breloom a Choice Band. That would work against you. I’m on the fence. A compelling argument might sway me, but for now I say Disallow Switcheroo / Trick.
Volt Switch: Vastly inferior to U-Turn, which we decided would be allowed. Disallow Volt Switch.
Recovery:
Heal Order / Milk Drink / Recover / Roost / Slack Off / Softboiled/ Pain Split: No to nonweather reliant heal moves. It makes Malaconda viable in rain. Dissallow non-sun dependent heal moves.
Leech Seed: On second though, no. No to outstalling Heatran. Disallow Leech Seed.
Moonlight / Morning Sun / Synthesis: Heals massive damage in the sun, and without the need of a Lum Berry, but is also dependant on sun for decent healing. Gives Malaconda an option outside of Lum+Rest while still tying him to sun. Allow sun dependent heal moves.
Rest: Sun’s answer to Hydration Rest Vaporeon = Harvest+Lum+Rest. Allow Rest.
Wish: I’m torn here. I used to think Wish would be great on Malaconda. But his grass typing really synergizes to Politoed too. And with Wish+Protect acting as a decent form of self-healing, what’s to stop him from becoming a rain wish passer too? True, rain teams still have Vaporeon with a bigger HP stat for Wish passing, but Nakaconda has so much better defense synergy with Politoed than Vaporeon. Malaconda resists both of Politoed's weaknesses while Vaporeon shares both those weaknesses.
I’d rather have the combination of Rest Ninetales with Heal Bell on Malaconda than Wish. You could still opt to do Rest Politoed, but at least it comes at the cost of a moveslot on the frog. Besides, rain can already do that with Aromatherapy Celebi or Heal Bell Vaporeon. Disallow Wish.