Along the game you can stop at Fusion Shops to fuse two cards together to get one better cards. The list below contains all the fusion cards and how to acquire them.

Fire Fusion Cards

These cards are created by fusing two fire type cards together.

Rookie
ModokiBetamon + Tsukaimon = D-Otamamon
Otamamon + DemiDevimon = Biyomon
BKGatomon + Gizamon = Muchomon
Gizamon + Kokuwamon = Muchomon
Kokuwamon + L-ToyAgumon = Solarmon
Darkrizamon + Gizamon = Solarmon
Gabumon + DemiDevimon = Agumon
Psychemon + Sharmamon = Goburimon
Sharmamon + Betamon = Candlemon

Champion
Dokunemmon + MetalGarurumon = Monochromon
Diaboromon + ModokiBetamon = Monochromon
Machinedramon + ToyAgumon = Tyrannomon
Vikemon + Tsukaimon = Tyrannomon
Darkrizamon + Vikemon = Aquilamon
Geremon + LadyDevimon = Aquilamon
Apokarimon + Icemon = Aquilamon
Shakkoumon + DemiDevimon = Apemon
Diaboromon + Betamon + Apemon
Infermon + Gomamon = Apemon
NiseDrimogemon + Diaboromon = ExVeemon
Stingmon + Ankylomon = ExVeemon
Zudomon + Tekkamon = ExVeemon
Mojyamon + DemiDevimon = Akatorimon
Fugamon + MudFrigimon = Akatorimon
Aruraumon + Gesomon = BomberNanimon
Fugamon + Gabumon = BomberNanimon
WaruSeadramon + BKGatomon = Centarumon
SnowAgumon + Myotismon = Centarumon
Jijimon + Birdramon = Ikkakumon
Betamon + Ogremon = Piddomon
Megadramon + Hagurumon = Meramon
Penguinmon + Devidramon = Tankmon
Tekkamon + Rockmon = Birdramon
Darkrizamon + L-ToyAgumon = Flarerizamon
Puppetmon + DemiDevimon = Greymon

Ultimate
Jijimon + SkullGreymon = RealMetalGreymon
LadyDevimon + Vademon = RealMetalGreymon
Machinedramon + Omnimon II = WarGreymon
Shakkoumon + WaruMonzaemon = WarGreymon
MetalGarurmon + Piedmon = WarGreymon
Brachiomon + LadyDevimon = Garudamon
Machinedramon + Mamemon = Garudamon
GranKuwagamon + Ikkakumon = Garudamon
Machinedramon + Whamon = MetalGreymon
Apokarimon + Nanimon = MetalGreymon
SuperStarmon + Bakemon = MetalGreymon
Omnimon II + Myotismon = Phoenixmon
Infermon + MetalEtemon = Phoenixmon
Vademon + VenomMyotismon = Gigadramon
Giromon + Infermon = Gigadramon
LadyDevimon + MetalGarurumon = Paildramon
GranKuwagamon + Giromon = Paildramon
Vikemon + Devimon = MasterTyrannomon
Piedmon + Whamon = MasterTyrannomon
Piedmon + Numemon = Vermilimon

Ice Fusion Cards

These cards are created by fusing two ice type cards together.

Rookie
MudFrigimon + Candlemon = Betamon
Solarmon + L-ToyAgumon = Betamon
ToyAgumon + Agumon = Betamon
Psychemon + Goburimon = SnowGoburimon
Salamon + BKGatomon = Penguinmon
Tsukaimon + Salamon = Gizamon
Candlemon + Psychemon = SnowAgumon
MoriShellmon + DemiDevimon = Gomamon

Champion
MoriShellmon + GranKuwagamon = Dolphmon
Apokarimon + MoriShellmon = Dolphmon
Seraphimon + Zassomon = Dolphmon
R.Gatomon + Wizardmon = Dolphmon
Seraphimon + Aruraumon = Frigimon
Puppetmon + D-Otamamon = Frigimon
Diaboromon + Kunemon = Frigimon
Vademon + Agumon = Frigimon
Machinedramon + Tentomon = Seadramon
Geremon + MetalGreymon = Seadramon
GranKuwagamon + Salamon = Seadramon
AeroVeedramon + Tekkamon = Garurumon
Gururumon + Magnadramon = Garurumon
Omnimon I + Geremon = Garurumon
Darkrizamon + Unimon = Shellmon
Fugamon + Ninjamon = Shellmon
Kabuterimon + Wizardmon = Whamon
Piedmon + Tentomon = Whamon
Shakkoumon + Goburimon = Gekomon
Solarmon + Vademon = Gekomon
WarGreymon + ClearAgumon = Gesomon
Solarmon + Geremon = Icemon
Darkrizamon + Yanmamon = Hyogamon
Puppetmon + Piddomon = Ikkakumon

Ultimate
Magnadramon + VenomMyotismon = MetalGarurumon
Machinedramon + Valkyrimon = MetalGarurumon
Seraphimon + SkullGreymon = WereGarurumon
Rosemon + LadyDevimon = WereGarurumon
Garudamon + Puppetmon = WereGarurumon
Vademon + Omnimon I = WereGarurumon
MagnaAngemon + Devidramon = WaruSeadramon
Paildramon + Starmon = WaruSeadramon
Apemon + Puppetmon = WaruSeadramon
Garudamon + MetalEtemon = Zudomon
Magnadramon + Phantomon = Zudomon
LadyDevimon + Sylphymon = Zudomon
Machinedramon + Rosemon = MarineAngemon
Rosemon + Infermon = MarineAngemon
SuperStarmon + Greymon = MegaSeadramon
Vermilimon + Jijimon = MegaSeadramon
Rosemon + Phantomon = Panjyamon
RealMetalGreymon + Thundermon = BlueMeramon

Nature Fusions Cards

These cards are created by fusing two nature type cards together.

Rookie
Candlemon + SnowAgumon = Gotsumon
Muchomon + SnowAgumon = Gotsumon
Hagurumon + Otamamon = Salamon
Gomamon + Goburimon = Salamon
Candlemon + Gabumon = Palmon
Muchomon + Gizamon = Elecmon
Solarmon + Gomamon = Tentomon
Psychemon + SnowGoburimon = Kunemon

Champion
NiseDrimogemon + WereGarurumon = R-Gatomon
Coelamon + MetalMamemon = R-Gatomon
Zudomon + Piddomon = R-Gatomon
Vikemon + Agumon = R-Gatomon
Omnimon I + SnowGoburimon = Kabuterimon
Vikemon + Psychemon = Kabuterimon
Meramon + Gesomon = Kabuterimon
Goburimon + Zudomon = Unimon
Gomamon + ExVeemon = Unimon
Meramon + Shellmon = Unimon
Shellmon + Vermilimon = Togemon
Shakkoumon + Gomamon = Togemon
Puppetmon + Betamon = Togemon
Shellmon + Paildramon = Veedramon
Starmon + Garurumon = Veedramon
Shellmon + Birdramon = Ninjamon
Rockmon + Coelamon = Ninjamon
WaruSeadramon + ModokiBetamon = Kuwagamon
Vi-Elecmon + Garurumon = Kuwagamon
Omnimon I + Icemon = Angemon
Muchomon + Dolphmon = Drimogemon
Meramon + Penguinmon = Vegiemon
Meramon + SnowGoburimon = Yanmamon
Shellmon + Muchomon = J-Mojyamon
Shellmon + ExVeemon = Leomon
Shellmon + Goburimon = MoriShellmon
WaruSeadramon + Agumon = Airdramon

Ultimate
RealMetalGreymon + Zudomon = HerculesKabuterimon
Imperialdramon + Vikemon = HerculesKabuterimon
Omnimon I + Omnimon II = HerculesKabuterimon
Vermilimon + Vikemon = HerculesKabuterimon
Vademon + Omnimon II = HerculesKabuterimon
Brachiomon + Monzaemon = Lillymon
Frigimon + Omnimon I = Lillymon
Meramon + Vikemon = Lillymon
Zudomon + Starmon = Lillymon
RealMetalGreymon + Panjyamon = MagnaAngemon
Gigadramon + Panjyamon = MagnaAngemon
Vikemon + ExVeemon = MagnaAngemon
RealMetalGreymon + BlueMeramon = Angewomon
SuperStarmon + Seadramon = Angewomon
Seadramon + WarGreymon = Angewomon
Meramon + WereGarurumon = Piximon
Brachiomon + Greymon = Piximon
Vikemon + Rockmon = Piximon
Whamon + Digitamamon = MegaKabuterimon

Dark Fusions Cards

These cards are created by fusing to Black (skull) cards together.

Rookie
MoriShellmon + Hagurumon = DemiDevimon
Psychemon + Vegiemon = DemiDevimon
Goburimon + Tentomon = Tsukaimon
Muchomon + Salamon = Tsukaimon
Elecmon + Psychemon = Aruraumon
Muchomon + Kunemon = Aruraumon
Candlemon + MoriShellmon = BKGatomon
ClearAgumon + Tentomon = Kokuwamon
D-Otamamon + Kunemon = Sharmamon
Solarmon + Kunemon = Dokunemmon

Champion
D-Otamamon + HerculesKabuterimon = Bakemon
MagnaAngemon + Vi-Elecmon = Bakemon
AeroVeedramon + ClearAgumon = Ogremon
Seraphimon + ModokiBetamon = Ogremon
MagnaAngemon + Hagurumon = Ogremon
Monochromon + Birdramon = Ogremon
MetalMamemon + Kabuterimon = Stingmon
Giromon + Unimon = Stingmon
Shakkoumon + Tentomon = Devimon
Meteormon + Vegiemon = Devimon
Valkyrimon + ClearAgumon = Tuskmon
Seraphimon + Muchomon = Tuskmon
MoriShellmon + SuperStarmon = Wizardmon
Vermilimon + Airdramon = Wizardmon
L-ToyAgumon + Veedramon = Guardromon
Biyomon + Kabuterimon = Soulmon
Tentomon + Sukamon = Fugamon
Muchomon + Ninjamon = Darkrizamon
Solarmon + Angemon = Tekkamon

Ultimate
Imperialdramon + MagnaAngemon = Machinedramon
Digitamamon + Magnadramon = Machinedramon
SuperStarmon + Sylpkymon = Machinedramon
Imperialdramon + Seraphimon = Piedmon
WarGreymon + AeroVeedramon = Piedmon
Puppetmon + AeroVeedramon = Piedmon
Paildramon + Valkyrimon = Piedmon
AeroVeedramon + Meramon = WaruMonzaemon
Kuwagamon + Omnimon I = WaruMonzaemon
Seraphimon + Birdramon = WaruMonzaemon
Piximon + ExVeemon = WaruMonzaemon
MagnaAngemon + Gigadramon = LadyDevimon
Seraphimon + Vermilimon = LadyDevimon
Vademon + Rosemon = LadyDevimon
Paildramon + Sylphymon = Infermon
Sylphymon + Shakkoumon = Infermon
Digitamamon + Rosemon = Infermon
Gigadramon + Angewomon = Myotismon
Seraphimon + Mamemon = Myotismon
Sylphymon + Giromon = Myotismon
MagnaAngemon + Aquilamon = Phantomon
ExVeemon + Angewomon = Phantomon
MasterTyrannomon + Angewomon = Megadramon
Vermilimon + Sylphymon = Megadramon
MagnaAngemon + Nanimon = Andromon
Puppetmon + Vegiemon = Andromon
Seraphimon + PlatinumSukamon = SkullGreymon

Rare Fusions

These cards can be created by fusing two rare cards together.

Rookie
Darkrizamon + Goburimon = ToyAgumon
Kunemon + Hyogamon = ToyAgumon
Palmon + Betamon = ToyAgumon
Palmon + SnowGoburimon = Vi-Elecmon
Candlemon + Tsukaimon = Vi-Elecmon
Gizamon + Gotsumon = Vi-Elecmon
Muchomon + Tsukaimon = Vi-Elecmon
Dokunemmon + Solarmon = ClearAgumon
Muchomon + BKGatomon = ClearAgumon
Biyomon + Tsukaimon = ClearAgumon
MoriShellmon + Betamon = L-ToyAgumon
Gotsumon + IceDevimon = L-ToyAgumon
Solarmon + DemiDevimon = Hagurumon

Champion
Seraphimon + SnowGoburimon = ShellNumemon
WarGreymon + Sharmamon = ShellNumemon
Diaboromon + Goburimon = ShellNumemon
Ogremon + Monochromon = ShellNumemon
Apokarimon + Flarerizamon + Ankylomon
Valkyrimon + Icemon = Ankylomon
GranKuwagamon + Biyomon = Thundermon
Zudomon + J-Mojyamon = Thundermon
WaruSeadramon + Elecmon = Sukamon
Piddomon + Ogremon = Sukamon
Bakemon + Solarmon = NiseDrimogemon
Wizardmon + Piddomon = Nanimon
Fugamon + Solarmon = SandYanmamon
Gabumon + Unimon = Geremon
Vikemon + Gotsumon = PlatinumSukamon
AeroVeedramon + Hyogamon = Starmon

Ultimate
Machinedramon + Monochromon = MetalMamemon
MetalSeadramon + Kuwagamon = MetalMamemon
Brachiomon + Veedramon = MetalMamemon
Megadramon + Greymon = MetalMamemon
Imperialdramon + Puppetmon = Shakkoumon
Omnimon I + VenomMyotismon = Shakkoumon
Machinedramon + Omnimon I = Shakkoumon
Piedmon + Garudamon = Shakkoumon
Rosemon + Omnimon II = Shakkoumon
LadyDevimon + MetalGreymon = Vademon
Brachiomon + MagnaAngemon = Vademon
Vikemon + R-Gatomon = Vademon
VenomMyotismon + Garudamon = Jijimon
Seraphimon + Brachiomon = Jijimon
Omnimon II + Piximon = Jijimon
MagnaAngemon + Frigimon = Mamemon
Seraphimon + Shellmon = Mamemon
Angemon + BlueMeramon = Mamemon
MetalGreymon + SkullGreymon = Giromon
Vermilimon + SkullGreymon = Giromon
Rosemon + Dolphmon = Giromon
Brachiomon + Leomon = Etemon
Panjyamon + Sylphymon = Digitamamamon
Airdramon + Omnimon II = Monzaemon