Cerberus
Elemental: None (Casts Double & Triple)
Starting Level: 23
Starting HP: 1490
Where do I get it? You can challenge Cerberus when you're in the main hall of Galbadia Garden in disk two. You have to beat him to get him.

GF Attack: Counter Rockets: Another one of those attacks that doesn't really attack. Instead he casts double and triple on your entire party.

Useful Abilities: Cerberus is one of those cool GFs that comes with a lot of junctioning abilities making the character junctioned to him really strong. Some of those junctioning abilities are ST-Atk-J and ST-Def-Jx4 and then there's my favorite Auto Haste.
Ability List
Ability

Str-J
Mag-J
Spr-J
Spd-J
Hit-J
ST-Atk-J
ST-Def-J
ST-Def-Jx2
St-Def-Jx4
Abilityx3
Magic
GF
Draw
Item
Spd+20%
Spd+40%
Auto-Haste
Expendx2-1
Alert
GFHP+10%
GFHP+20%
GFHP+30%
AP Needed

Learned
50
50
120
Learned
160
100
130
180
Learned
Learned
Learned
Learned
Learned
150
200
250
250
200
40
70
140
Leads To...

Nothing
ST-Atk-J
ST-Def-J
Spd+20%
Nothing
Nothing
ST-Def-Jx2
ST-Def-Jx4
Nothing
Nothing
Nothing
Nothing
Nothing
Nothing
Spd+40%
Auto-Haste
Nothing
Nothing
Nothing
GFHP+20%
GFHP+30%
Nothing