From Final Fantasy - Wiki on Neoseeker

Experiment No. 119 is a mission from Final Fantasy VII: Crisis Core. For a complete list, visit Missions (FFVII:CC).

Introduction

I transplanted data from one experiment to a different monster. Their thought processes are different, but the basic parameters have been increased, so I am curious to see if it can be defeated by a SOLDIER member.

Enemies

• Experiment No. 119 (boss battle)

Strategy

This experiment is another version of the Evilgoyle but will use Barrier and MBarrier. Equip Dispel Blade to counter these enhancements if you want, but you will note that the spells eventually wear off. Its Tri-Fire and Energy spells are very easy to dodge, so there's no special equipment necessary. Start the battle with a Costly Punch. Continue using regular critical attacks and heal as necessary until it falls OR you can use a second Costly Punch to finish it off.