There are dozens of enemies you can use to your own advantage in Chrono Cross. The first way you can use them is via the character Sprigg. Her special technique, Doppelgang, allows you to change her into a monster. The second way is the Grand Slam inside the S.S. Zelbess, where you can pit your monsters against Janice's. If Janice joins your party (i.e. you beat her three times straight) you can't access the Grand Slam anymore.
You start with a limited list of monsters. To make your list grow, you have to defeat more monsters. But there are rules: 1) No monster will be added to your list unless it is defeated by either Sprigg or a character wearing the Forget-me-not Pot accessory. 2) If you're using Sprigg to defeat the monsters, she must be in her normal form. 3) Not every monster is morphable; some can never be added to the list.
There are two major differences between Sprigg's monsters and the ones in the Grand Slam. Each monster in the Grand Slam has its own HP, whereas Sprigg's morphs retain her own HP. However, the monsters in the Grand Slam cannot use ANY L.1 Elements.
I've listed all the Element grids for the monsters. There's an extra L.1 Green tech, to the bottom of the entire grid, called
Doppelgang; this allows you to change back to Sprigg or to any other monster during battle. Obviously it doesn't show up during Grand Slam (since you can't use L.1 techs then).
If you've missed a monster, you can usually go back to the Bend of Time and fight them there. However, for some monsters, once you've missed them that's it. I've marked those monsters with a (B).
As a rule, the later monsters are stronger than earlier ones. Just because a monster has a large Element grid doesn't mean it's a strong monster. However, I have no accurate method of rating them in terms of strength or magic strength, sorry...
Finally: Most monster attacks are just "damage / one enemy", in the Element of that monster. The few attacks with special effects (status or multi-target) are listed at the bottom of the page.
Acacia PVT Location: Viper Manor (B)
| TurnGreen |
| TurnYellow | Cure+1 | ElectroBolt-1 |
| Cure | StormBlow | StormBlow | StormBlow | EagleEye+1 |
Acacia SGT Location: Viper Manor (B)
| TurnGreen |
| TurnYellow | CurePlus-1 | ElectroJolt+1 | ElectroBolt |
| Cure | AcaciaBlade | AcaciaBlade | AcaciaBlade | Hi-Res+1 |
Aero-Guard Location: Chronopolis
| IceBlast-3 | IceBlast-2 | IceBlast-1 | IceLance+2 | IceLance+3 |
| IceBlast-3 | CureAll-3 | CureAll-2 | CureAll-1 | CureAll | Vigora |
Airframe Location: Isle of the Damned
Alphabat Location: Fort Dragonia
DarkBeam | Imbecile-2 |
DarkBeam | DarkBeam | DarkBeam | GravityBlow+3 | Gravitonne+2 |
Beach Bum Location: Lizard Rock
Beeba Location: Hydra Marsh (B)
| LoRes-3 |
| LoRes-3 | HiRes-2 |
| LoRes-3 | PhysNegate-4 | ThundaStorm-3 |
Bubba Dingo Location: Fossil Valley
Sic'em | Weaken-2 |
Sic'em | Sic'em | Sic'em | Sic'em |
Sic'em |
Bulb Location: Shadow Forest
| Heal-1 | Bushwhacker+1 | Bushwhacker+2 | HealAll |
| Bushwhacker | Heal | BatEye-1 | InfoScope-2 | Bushbasher+2 | Carnivore+1 |
| Heal-1 |
Cassowary Location: Shadow Forest
| LoRes-3 | LoRes-2 | LoRes-1 | TheOld1-2-3 |
| Uplift | Uplift+1 | HiRes-1 | TheOld1-2-3 | TheOld1-2-3 | AntiGreen+3 |
CatBurglar Location: Mount Pyre
| FirePillar-2 | Weaken-2 |
TripleFist | TripleFist | TripleFist | Strengthen | MagmaBomb+3 | Ninety-Nine |
Combat Location: Fort Dragonia
| GravityBlow | TurnBlack+1 | Genius-1 | Imbecile |
| GravityBlow | BatBeam | BatBeam | AntiWhite+1 | SealAll-1 | (Empty) | (Empty) | Revenge+3 |
BatBeam |
Combot Location: Chronopolis
Crossbones Location: S.S. Invincible
| HellSoul-1 | SwordDance |
SwordDance | SwordDance | HellSoul+1 | HellSoul+2 | HellBound+1 |
Cuscus Location: Shadow Forest
| Heal-1 |
| Heal-1 | Bushwhacker+1 | Bushwhacker+2 |
| Heal-1 | TurnGreen+1 | BatEye-1 | EagleEye |
Cybot Location: Fort Dragonia
| Uplift | Uplift+1 |
| TurnYellow | TurnYellow+1 | Earthquake-2 | Earthquake-1 |
| TurnYellow | BeatenEarth | BeatenEarth | BeatenEarth | BeatenEarth |
DaffyDwarf Location: Hydra Marsh, Water Dragon Isle
Hi-HoWarCry | ElectroJolt |
| ElectroJolt-1 | ElectroJolt | ElectroBolt-1 | ElectroBolt | ElectroBolt+1 | ThundaStorm |
Hi-HoWarCry |
DaggyDwarf Location: Hydra Marsh, Water Dragon Isle
Hi-HoWarCry |
Hi-HoWarCry | Hi-HoWarCry | Hi-HoWarCry |
Hi-HoWarCry | Hi-HoWarCry | Hi-HoWarCry | Hi-HoWarCry | Hi-HoWarCry | Hi-HoWarCry |
Dead Beat Location: S.S. Invincible, Isle of the Damned
| HellSoul-1 |
| HellSoul-1 |
| HellSoul-1 |
| HellSoul-1 |
| HellSoul-1 |
| HellSoul-1 |
| HellSoul-1 |
Dodo Location: Fossil Valley
| Purify-3 |
Peck | RecoverAll-1 |
Peck | Peck | Peck | Peck | Peck | Revive+5 |
Drongo Location: Fossil Valley
| Heal-1 |
| TurnGreen | HealAll | BatEye-1 |
PeaShooter | PeaShooter | PeaShooter | PeaShooter | PeaShooter |
Dwarf Location: Hydra Marsh, Water Dragon Isle
Hi-HoWarCry | Hi-HoWarCry | ElectroBolt-1 | HiRes | HiRes+1 | AntiGreen+3 |
Hi-HoWarCry | Hi-HoWarCry | ElectroBolt-1 | Upheaval+1 | Upheaval+2 | Earthquake+1 | Earthquake+2 |
Flea (absorbs Red Element attacks) Location: Bend of Time (B)
| TurnWhite | | | | AntiBlack+2 |
| TurnBlack | | | | AntiWhite+2 |
| TurnGreen | | | | AntiYellow+2 |
TurnYellow | | TheStare | | AntiGreen+2 |
| TurnBlue | Fireball+1 | TheStare | FirePillar+1 | AntiRed+2 | Inferno+1 |
| TurnRed | Weaken-2 | TheStare | Strengthen | AntiBlue+2 | Ninety-Nine |
Fossicker Location: Earth Dragon Isle
| Earthquake |
| Earthquake+1 |
| (Empty) |
| (Empty) |
| AntiGreen+1 |
| TurnYellow | | Uplift+2 |
| TurnYellow | Upheaval+1 |
Gerridae Location: Shadow Forest
| Cure | CurePlus-1 |
| Cure | CurePlus-1 | CurePlus |
| Cure | SquirtGun | SquirtGun | SquirtGun | SquirtGun | SquirtGun |
Gizmotoid Location: Chronopolis
HighBeam | HighBeam | HighBeam | Strengthen |
HighBeam | HighBeam | HighBeam | HighBeam |
| (Empty) |
Gloop Location: Shadow Forest
Goo | Goo | Goo | Goo | Goo | Goo | CureAll+2 |
Goo | Goo | Goo | Goo | Goo | Goo | Goo |
Goo | Goo | Goo | Numble | Goo | Goo | Goo |
Gobledygook Location: Shadow Forest
Googhoul Location: Fort Dragonia
| TurnYellow+1 |
| ElectroJolt-1 | ElectroJolt | ElectroBolt-1 | HiRes |
Gnash | Gnash | Gnash | Uplift+3 | Uplift+4 | AntiGreen+3 |
Gremlin Location: Dead Sea
Gurgoyle Location: Fort Dragonia
Gyroblade Location: Chronopolis
| PhotonBeam-2 |
| PhotonRay | PhotonBeam-1 | PhotonRay+2 | PhotonBeam+1 |
| RecoverAll-2 | HolyHealing-4 | HolyHealing-3 | RecoverAll+1 | PhotonRay+4 | MagNegate |
HotDoggity Location: Mount Pyre
| Fireball+6 |
| FirePillar-2 | | Fireball+5 |
GnawBones | FirePillar-1 | GnawBones | TurnRed+3 | GnawBones |
KomodoPup Location: Lizard Rock
| Cure | TurnBlue+1 |
SquirtGun | SquirtGun | SquirtGun | SquirtGun | CureAll |
Lagoonate Location: Marbule, Water Dragon Isle
Just4Kicks | | Just4Kicks |
Just4Kicks | CurePlus-1 | Just4Kicks | AquaBall+1 |
Just4Kicks | CurePlus-1 | Just4Kicks | AquaBall+1 |
Mama Dingo Location: Fossil Valley
| Strengthen-3 |
| Strengthen-3 | Strengthen-2 |
| Strengthen-3 | Bite | Bite | Bite | Bite | Bite |
Man-At-Arms Location: Viper Manor
Man-Of-War Location: Viper Manor
| HellSoul-1 | Gravitonne-1 |
| HellSoul-1 | Gravitonne-1 | AntiWhite |
Mantarrey Location: Water Dragon Isle, Marbule
| AquaBall-2 |
| TurnBlue | Numble-2 | Nimble-1 |
FlyLow | FlyLow | FlyLow | FlyLow | AntiRed+2 |
Myxomocete Location: Terra Tower
| TurnWhite-1 | Meteorite | Purify-1 | MeteorShower | HolyHealing-1 | WeakMinded+2 |
| Meteorite-1 | Meteorite | StrongMinded | MeteorShower | AntiBlack+2 | MagNegate |
Neo-N-Bulb Location: Viper Manor (B)
| Heal-1 |
| Heal-1 | Heal | HealAll-1 | HealAll | Bushbasher+2 |
| InfoScope-5 | Heal | BatEye-1 | EagleEye | Bushbasher+2 | Bushbasher+3 | Carnivore+2 |
Opah Fish Location: Lizard Rock
| Weaken-3 | Weaken-2 |
| Fireball | Fireball+1 | FirePillar |
| Fireball | Fireball+1 | Fireball+2 | MagmaBurst | MagmaBurst+1 | MagmaBurst+2 | RedField+2 |
Ozzie (absorbs Green Element attacks) Location: Bend of Time (B)
| InfoScope-5 | InfoScope-4 | InfoScope-3 | InfoScope-2 | InfoScope-1 |
| Heal-1 | LoRes-2 | HiRes-1 | HiRes | Bushbasher+2 | HealAll+2 | PhysNegate+1 |
| BatEye-3 | EagleEye-2 | Bushbasher | Bushwhacker+3 | Bushbasher+2 | Carnivore+1 | MagNegate+1 |
Paper Boy Location: Fort Dragonia
| TurnYellow | | LowRes-1 |
PaperMoon | PaperMoon | PaperMoon |
Porre PVT Location: Viper Manor (B)
| TurnRed | BayonetGun | Cure+2 |
| TurnBlue | BayonetGun | BayonetGun | Numble | (Empty) | (Empty) | Revenge+2 |
Porre SGT Location: Viper Manor (B)
| TurnRed |
| TurnBlue | BayonetPlus | Cure+2 |
| CurePlus-2 | BayonetPlus | BayonetPlus | BatEye | (Empty) | (Empty) | (Empty) | Ninety-Nine+2 |
Portalgheist Location: Viper Manor (B)
| ElectroJolt-1 | ElectroJolt | ElectroBolt-1 | ElectroBolt | AntiGreen+2 | AntiGreen+3 |
Prehysteric Location: Gaea's Navel
Preymantis Location: Gaea's Navel
| AeroSaucer-1 |
| Heal-1 | Stinger | AeroBlaster-1 | HealAll | BigSwatter |
| TurnGreen | Heal | Stinger | AeroSaucer+2 | HealAll+1 | BigSwatter |
Puffy Location: El Nido Triangle
Needlework |
Needlework | Needlework |
Needlework | Needlework | Needlework |
RockRoach Location: Earth Dragon Isle
| LoRes-3 | SpinOff |
| LoRes-3 | SpinOff | SpinOff | HiRes | AntiGreen+2 |
SandSquirt Location: Lizard Rock
| AquaBeam | Cure+1 | CurePlus |
SquirtGun | SquirtGun | SquirtGun | AquaBeam+3 |
Scorpiod Location: Water Dragon Isle
| Cure |
| Bushbasher-2 | Cure+1 | CurePlus | TurnBlue+3 |
| Bushbasher-2 | Bushbasher-1 | Bushbasher | Bushbasher+1 | Bushbasher+2 | Deluge+1 | Iceberg+1 |
SideSteppa Location: El Nido Triangle, Water Dragon Isle
Slash (absorbs Blue Element attacks) Location: Bend of Time (B)
| WindSlash | | DashSlash | | CurePlus+3 |
| Cure | WindSlash | IceLance+1 | DashSlash | IceBlast+1 | CurePlus+3 | Iceberg+1 |
If Sprigg is in a party with Serge and Kid, her Slash morph can use its DashSlash to execute the Blue-Element "Z-Slash" triple tech with Serge's FlyingArrow (L.7) and Kid's RedPin (L.5) techniques.
SnibGoblin Location: Hydra Marsh
| Heal-1 |
| Bushwhacker | Heal | EagleEye-1 | AeroBlaster |
| Bushwhacker | Bushbasher-1 | Bushbasher | EagleEye | HealAll+1 |
SnobGoblin Location: Hydra Marsh
| Heal-1 |
| AeroSaucer-1 | Heal | Bushbasher | BatEye |
| AeroBlaster-3 | AeroBlaster-2 | Bushbasher | BatEye |
SpearFisher Location: Viper Manor Sewers
Taurminator Location: Mount Pyre
TotalChaos Location: Dimension Vortex
| BlackHole+2 |
| HellSoul+5 |
| Gravitonne+3 |
| SealAll-1 |
| Diminish-2 |
| (Empty) | FreeFall-3 | TurnBlack+2 |
Tragedienne Location: Dead Sea
Tutanshaman Location: Fossil Valley
| MagmaBomb+3 |
| MagmaBomb+2 | MagmaBurst+1 | Ninety-Nine |
| Ninety-Nine-4 | MagmaBomb+1 | Weaken | Strengthen+1 | MagmaBurst+2 |
| Volcano-5 | Volcano-4 | FirePillar | FirePillar+1 | Strengthen+1 | MagmaBurst+2 |
Tzetze Fly Location: S.S. Invincible
| HellSoul-1 | Genius-2 |
| HellSoul-1 | Imbecile-2 | Imbecile-1 |
| HellSoul-1 | HellBound-2 | Genius-1 | HellBound | HellBound+1 |
Whoot Location: Terra Tower
WightKnight Location: H Isle of the Damned (B)
WillO'Wisp Location: Viper Manor
Wingapede Location: Hydra Marsh (B)
Witchetty Location: Viper Manor Sewers
| CurePlus-2 |
| CurePlus-2 | AquaBall-1 |
| CurePlus-2 | AquaBall-1 | IceBlast-1 |
Wraith Location: S.S. Zelbess, Shadow Forest
YellowBelly Location: Earth Dragon Isle
Monster Attacks
| AcidicGas | Damage + poison / single |
| BlackRain | Damage + cursed / all |
| Brimstone | Damage + burns / all |
| Charge! | Damage + burns / single |
| DarkBreath | Damage + darkness / single |
| DarkMist | Darkness / all |
| Devour | Damage + flu / single |
| GiddyBreath | Dizzy / single |
| Gnash | Damage + sprain / single |
| GoBallistic | Damage / all |
| IceTongs | Damage + frozen / single |
| JumpStart | Damage + sprain / single |
| JurasicBeat | Confusion / all |
| MakeWaves | Damage / all |
| OwlEyes | Status effects / single |
| PoisonGas | Posion / all |
| Rage | Raise physical attack / all allies |
| SadnessWave | Lower physical attack / all |
| Slime | Dizzy plus seal all Yellow Elements / single |
| SpiritsUp | Raise physical defense / all allies |
| Stinger | Damage + poison / single |
| SuckBlood | Drain HP / single |
| TheStare | Damage + confusion / all |
| ToxicBreath | Damage + poison / single |
| WaveOfFear | Lower physical defense / all |
I have not tested the following monsters for morphability: BlueMoaman, Criosphinx, Ketchop, KingMoaman, Red Moaman.