Accupressure - Allow
It's a fantastic flavor move and is far too unpredictable to prove dangerous. I see no reason to disallow this.
Fake Tears - Disallow
There is not a single other user of either Fake Tears or Metal Sound that has Voodom's combination of speed, power, STAB coverage, and durability. The fastest user is Jolteon, who is admittedly frail and lacks coverage. The second fastest is Espeon, whose durability and coverage are even worse than Jolt's. Here are some calcs to back this up (as usual, 252 SpA Naive LO Voodoom):
+0 Aura Sphere vs. -2 SDef CroCune: 72.3% - 85.4%
+0 Aura Sphere vs. -2 SDef Wish Vaporeon: 76.6% - 90.4%
+0 Aura Sphere vs. -2 SDef Standard Lead Swampert: 84.5% - 99.8%
+0 Aura Sphere vs. -2 SDef Cursepert: 64.9% - 76.5%
+0 Aura Sphere vs. -2 SDef Lead Machamp: 97.1% - 114.4%
+0 Ice Beam vs. -2 SDef Baton Pass Togekiss: 94.7% - 111.8%
+0 Ice Beam vs. -2 SDef Specially Defensive Zapdos: 95% - 112.3%
Basically, this means that none of these guys would ever want to risk staying in at -2 SDef. If your opponent only has one or two Voodoom checks, you can end up scaring them away almost every single time. If we give it Fake Tears, potentially nothing outside of Scarfers would successfully check this.
Destiny Bond - Allow
Likely the best flavor move of the lot and is also competitively viable given Voodoom's speed.
Perish Song - Allow
Voodoom isn't so bulky that it can continually pull off Perish Trapping sets with ease. It's also a good flavor move, so there should be no reason to disallow this.
Mean Look - Allow
Mean Look in and of itself is not at all broken on Voodoom, as it has no business hanging around with checks like Bulky Waters, Togekiss, Scarf Cross, etc. It's also necessary for Perish Trapping.
Baton Pass - Disallow
Again, without Mean Look, Baton Pass will be a great move to have on Voodoom. SubPassing to Kiss or even passing forward an NP from Kiss seem like perfectly viable strategies to employ.
The only thing that might pull it too far away from its concept is BU passing to other physical sweepers, especially Gyarados and Dragonite. In and of itself, Bulk Up might not be that dangerous on Voodoom, especially with just base 85 Atk. But as mentioned above, Bulk Up starts turning sour when paired with Baton Pass on such a speedy pokemon. Togekiss has absolutely zero use for Bulk Up, so Voodoom is better paired with things like Gyarados or Dragonite, both of whom resist its Fighting weakness and greatly appreciate the extra attack and defense. Either of these two that gets passed a Bulk Up can DD on the ensuing switch for a deadly +2/+1/+1 to Atk/Def/Spd. The plethora of other physical attackers will also love getting the boosts.
This is in no way an automatic game breaker, and I'm not so concerned about how strong the strategy is. But I feel that it is strong enough that it might pull Voodoom's PRIMARY role away from being Togekiss' perfect mate. If I can pass Bulk Ups to my Gyara, I will personally feel more inclined to use it for that role rather than pair it up with 'Kiss. All three could very well be on a team together, but the core would end up being GyaraDoom, not TogeDoom.
Mean Look + Baton Pass - Disallow
This has already been covered perfectly by prior arguments in this thread. In short, we will be making the fastest and most offensively gifted trap passer in the whole game. No.
It's a fantastic flavor move and is far too unpredictable to prove dangerous. I see no reason to disallow this.
Fake Tears - Disallow
There is not a single other user of either Fake Tears or Metal Sound that has Voodom's combination of speed, power, STAB coverage, and durability. The fastest user is Jolteon, who is admittedly frail and lacks coverage. The second fastest is Espeon, whose durability and coverage are even worse than Jolt's. Here are some calcs to back this up (as usual, 252 SpA Naive LO Voodoom):
+0 Aura Sphere vs. -2 SDef CroCune: 72.3% - 85.4%
+0 Aura Sphere vs. -2 SDef Wish Vaporeon: 76.6% - 90.4%
+0 Aura Sphere vs. -2 SDef Standard Lead Swampert: 84.5% - 99.8%
+0 Aura Sphere vs. -2 SDef Cursepert: 64.9% - 76.5%
+0 Aura Sphere vs. -2 SDef Lead Machamp: 97.1% - 114.4%
+0 Ice Beam vs. -2 SDef Baton Pass Togekiss: 94.7% - 111.8%
+0 Ice Beam vs. -2 SDef Specially Defensive Zapdos: 95% - 112.3%
Basically, this means that none of these guys would ever want to risk staying in at -2 SDef. If your opponent only has one or two Voodoom checks, you can end up scaring them away almost every single time. If we give it Fake Tears, potentially nothing outside of Scarfers would successfully check this.
Destiny Bond - Allow
Likely the best flavor move of the lot and is also competitively viable given Voodoom's speed.
Perish Song - Allow
Voodoom isn't so bulky that it can continually pull off Perish Trapping sets with ease. It's also a good flavor move, so there should be no reason to disallow this.
Mean Look - Allow
Mean Look in and of itself is not at all broken on Voodoom, as it has no business hanging around with checks like Bulky Waters, Togekiss, Scarf Cross, etc. It's also necessary for Perish Trapping.
Baton Pass - Disallow
Again, without Mean Look, Baton Pass will be a great move to have on Voodoom. SubPassing to Kiss or even passing forward an NP from Kiss seem like perfectly viable strategies to employ.
The only thing that might pull it too far away from its concept is BU passing to other physical sweepers, especially Gyarados and Dragonite. In and of itself, Bulk Up might not be that dangerous on Voodoom, especially with just base 85 Atk. But as mentioned above, Bulk Up starts turning sour when paired with Baton Pass on such a speedy pokemon. Togekiss has absolutely zero use for Bulk Up, so Voodoom is better paired with things like Gyarados or Dragonite, both of whom resist its Fighting weakness and greatly appreciate the extra attack and defense. Either of these two that gets passed a Bulk Up can DD on the ensuing switch for a deadly +2/+1/+1 to Atk/Def/Spd. The plethora of other physical attackers will also love getting the boosts.
This is in no way an automatic game breaker, and I'm not so concerned about how strong the strategy is. But I feel that it is strong enough that it might pull Voodoom's PRIMARY role away from being Togekiss' perfect mate. If I can pass Bulk Ups to my Gyara, I will personally feel more inclined to use it for that role rather than pair it up with 'Kiss. All three could very well be on a team together, but the core would end up being GyaraDoom, not TogeDoom.
Mean Look + Baton Pass - Disallow
This has already been covered perfectly by prior arguments in this thread. In short, we will be making the fastest and most offensively gifted trap passer in the whole game. No.