Ashton in SO2 is a fighter (vs. mage) and thus has skills by means of Killer Moves. Here's a list of his skills, when he learns them, and how much they cost to use.

Twin Stab
Level Learned: Known when recruited
MP Used: 4
Proficiency: 100

Cross Slash
Level Learned: Known when recruited
MP Used: 8
Proficiency: 100

Leaf Slash
Level Learned: Known when recruited
MP Used: 19
Proficiency: 200

Northern Cross
Level Learned: 18
MP Used: 9
Proficiency: 200

Piercing Swords
Level Learned: 22
MP Used: 12
Proficiency: 130

Hurricane Slash
Level Learned: 45
MP Used: 16
Proficiency: 200

Dead Triangle
Level Learned: 53
MP Used: 19
Proficiency: 200

Dragon Breath
Level Learned: 64
MP Used: 28
Proficiency: 140

Sword Dance
Level Learned: 70
MP Used: 32
Proficiency: 400

Tri-Ace
Level Learned: Found in the Cave of Trials
MP Used: 45
Proficiency: 140