You get this achievement for getting a 15 hit combo.
This can be done relatively early in the game.
Most of the early enemies get knocked back after 3 hits of Bolt's light attack 'X', which means you should try to move your combo on to another enemy after this.
- Try to do this when you have a group of the weaker enemies - as it becomes more difficult when the harder enemies are involved.
- Also, using grabs 'B' can sometimes help keep the combo chain going. As it allows enemies to move closer during the time you are throwing the enemy.