Defeating Cerberus

  Cerberus is found in Galbadia Garden.  You don't have to fight him, but if you don't, you will not gain this GF.  This battle should not be a problem, and if it is, you probably need to Level up your characters a bit more, or check out their stats, and junction more suitable magic to their stats.  For tips about Junctioning click here.

  Cerberus holds Triple spells, these spells allow your characters to cast three spells in one round.  Draw and cast Triple on each character.  Stock some Triple spells if you want to.  If you have some Ultimas, cast 3 Ultimas on Cerberus.  Each one will cause some 3500HP damage; Cerberus has 10000HP, so these 3 Ultimas will beat him.  If you have no Ultimas, you'll have to rely on brute force, or high-powered magic spells.
     Keep an eye on your HP, cast Regen on all your characters, Haste on all your characters, and Shell if you wish.  Whenever Cerberus casts Triple on himself, cast a Dispel spell on him.  Use high powered magic spells in triplicate, attacks and Limit Breaks.  If you keep your HP high, this battle will not be a problem.