Killer Moves
After a character has used a KM for a certain number of times, the become more proficient with it, and the attack "evolves." Once this happens, the Killer Move will usually cause more damage, have better accuracy, have more hits, hits faster, is flashier, etc. There is a certain number at which this happens. Some Killer Moves don't really have an evolution. In this case, there will be no proficiency number.
Killer Moves are the special physical attacks of SO2. Every Fighter in the game has their own unique Killer Moves which they use on the battlefield. KMs use MP just like spells, but are slightly more cool-looking. The characters that have KMs are Claude, Ashton, Precis, Bowman, Opera, Ernest, Dias, and Chisato.
Fighters obtain KMs through two main ways: First, the character starts with the KM in his or her inventory. The second method is the usual one, and that is leveling up. At certain levels, characters will figure out how they can use their abilities better or in a new way, thus obtaining a new KM. Other methods are only special cases. Opera and Precis can obtain Killer Moves by creating items through Machinery.  Precis can also take part in a PA which gives her Killer Move. And lastly, Ashton can find one of his KMs sitting in a treasure chest (don't ask me). I'll describe these special methods for each corresponding character in their "KM charts".
Since there's nothing else to say, on to the Killer Moves!
Claude C. Kenni
Move Name
Level Learned
MP Consumption
Proficiency
Effect
Phase Gun
--
0
--
Federal-issued Molecular Blaster. 'Nuff said.
Air Slash
3
4
200
Directs a powerful shock wave at the target.
Shooting Stars
7
7
300
Claude directs the power of a falling star into his fist.
Head Splitter
13
9
260
Jumping high into the air and down upon the enemy, Claude gives it one serious headache.
Energy Sword
20
11
--
*Restores HP* by controlling the flow of life force within the body.
Ripper Blast
38
17
270
Claude kicks jagged boulders at his opponent.
Burst Knuckle
28
12
100
Claude concentrates his fighting power into a flame that leaps from his fist.
Twin Slash
45
15
160
No special powers here. Two piercing slashes to the opponents torso'll take care of 'em.
Dragon Howl
53
28
500
A ferocious energy dragon attacks the enemy. Don't ask how it happens, just accept it.
Sword Bomber
62
32
420
Claude leaps into the air and sends raging flames down open the target. Nice.
Mirror Slice
70
38
460
Claude's blade flashes again and again as he slashes and slices the enemy to pieces.
Ashton Anchors
Move Name
Level Learned
MP Consumption
Proficiency
Effect
Twin Stab
--
4
100
A technique in which the target is stabbed repeatedly.
Cross Slash
--
8
100
Two slashes at the enemy, the latter slash's momentum carrying Ashton across the field.
Leaf Slash
--
19
--
The user instantly shreds the enemy while hiding in a blur of leaves.
Northern Cross
18
9
200
Creates a huge ice figure to assault the target.
Piercing Swords
22
12
130
A technique in which Ashton throws swords as if they were darts. Bulls-eye!
Hurricane Slash
45
16
200
Ashton uses the momentum from his spinning body to slice up the target.
Dead Triangle
53
19
200
Three Ashtons are better than one, and Ashton makes good on that as he rips the opponent apart in a blur of swords in this KM.
Dragon Breath
64
28
140
Gyoro and Ururun are transformed into elemental giants. Can you say "bad breath?"
Sword Dance
70
32
400
A technique known only to the House of Anchors, the user attacks in a swift martial dance.
Tri-Ace
--
45
140
A secret technique: Ashton uses the power of tri-A, god of creation to attack the enemy.
Precis F. Neumann
Move Name
Level Learned
MP Consumption
Proficiency
Effect
Rocket Punch
--
4
120
As if the explosive warhead isn't enough, Precis screams in her awful high-pitched voice, apparently trying to destroy the enemy's eardrums too.
Hop Step
--
5
140
Precis hops into the air and brings a hammer down upon the target.
Mole
17
7
100
A technique in which Precis unleashes the mole version of Bobot (death itself).
Ally-Oop!
25
8
220
Precis throws Bobot 1.0 at the enemy. With an increase in level, Bobot 2.0 is used as well.
Parabola Beam
38
12
240
Shoots a ring of laser light from a parabolic dish.
Bang-Bang Attack
49
15
510
A technique in which a line of hammers is swung repeatedly (OW!OW!OW!) at the target.
Bloody Mary
57
32
360
Bobot (death itself) is equipped with twisting drills and ridden into the fray.
Mujin Super Beam
--
24
120
Bobot (death itself) fires a huge laser beam.
Holo-Holograph
--
20
130
A technique known only to the House of Anchors is rearranged a bit...
Barrier
--
28
200
Bobot (death itself) generates a highly damaging field.
Mujin Super Beam is learned through the item Mech Launcher.
Barrier
is learned through the item Plasma Zap-Stick.
Holo-Holograph
can be learned two ways. It can be learned through the item Holoprojector, or it can be learned through a Private Action in Fun City. Consult the Private Action section for more details. In my opinion, it's funner to see the PA.
Tri-Ace is learned through finding it in a treasure chest. This chest is located in the Cave of Trials, on Level 10. You can consult the Secrets section for more information.
Bowman Jean
Move Name
Level Learned
MP Consumption
Proficiency
Effect
Coming Soon