I am totally in favour of Calm Mind. Alakazam has easily a better typing than this thing and doesn't have the time to Calm Mind, so how is the argument different for CAP5? I don't see any problem with it.
Stealth Rock should obviously be part of this Pokemon's movepool. It's a Rock type, and Stealth Rock is a Rock typed move. So it must have it, period. It's like saying that this Pokemon cannot have Sandstorm in its movepool. That's bollocks.
If you people are worried about suicide leads, then why did you vote for Explosion?
Alakazam has easily a worse weakness, no immunities, and a type completely immune to its primary STAB, worse defenses across the board, and a shallower special movepool. It is also slower. Weavile can come in on CM Zam and instantly KO it with Pursuit. The same cannot be said for Rockmon.
In fact, Rockmon has more HP with 0 EVs than Alakazam does with 252. Its defense is higher, and in a Sandstorm, Its overall special defense is superior to a Max/Max HP/SDef Alakazam. People have also talked about giving this Recover for some absurd reason.
Modest Vaporeon (No EVs) Surf in Sandstorm to 0/0 1 CM Rockmon: 46-54%. (I used Blaziken on Metalkid's, knowing that Sandstorm cancels out STAB.)
Its a shaky 2HKO with No investment, STAB, from a water pokemon with one of the better special attacks. Now I grant you it was not an EV'd Surf, but then, Rockmon wasn't EV'd either.
What you're trying to sell is the idea that a pokemon with paperweight defenses and high, but beatable speed is equivalent to a pokemon with competent defenses a weather-induced boost, and generally unbeatable speed. The two could not be more different.
Oh, and did I mention that potentially, not only could Rockmon have 508 SAttack, its Primary Special STAB could also Burn you 30% of the time, giving it a functional 332 Defense.
Yup Yup, this is exactly like Alakazam... Except not like it at all.
Oh a final note:
Votes Going as they are, assuming this gets Calm Mind, expect this set:
Rockmon @ Babiri Berry (halves Steel damage)
252 Spe/252 SA/4 HP
Nature: Timid (+Spe, -Atk)
Trait: Levitate
~ Calm Mind
~ Brimstone
~ Flamethrower/Fire Blast
~ Earth Power/HP Grass/Substitute
Please point out to me a single pokemon who would like the honor of dealing with this. 252/0 HP/Sdef Bronzong takes 97-114% from Fire Blast. Flamethrower does not OHKO it, but Gyro Ball will not OHKO thanks to Babiri Berry. Forget about Metagross, Scizor, or Lucario countering this.
Last option: EP for Coverage, HP Grass for Pert or Waters, Sub for non SToss Blissey.