Fusion

is a process that combines two Yo-kai, two items, or an item and a Yo-kai, to create a piece of equipment/stronger and evolved Yo-kai for the player to use.

How to do Fusion
Fusions can be performed at the Shoten Temple where the player selects the required items or Yo-kai Medals or both in order to to form a new Yo-kai.

In Yo-kai Watch 3, to perform Fusion while in the United States, one needs to head into the Broccolin Church in the East Cashew District.

Yo-kai Watch

 * -|All Fusions=
 * Ake + Buff Weight = Payn
 * Venoct Aura + Tattered Gauntlet = Venoct Gauntlet
 * Pupsicle + Snowstorm Cloak = Chilhuahua
 * Castelius II + Castelius II = Castelius I
 * Chansin + Legendary Blade = Sheen
 * Signibble + GHz Orb = Signiton
 * Plain Ring + Topaz = Lightning Ring
 * Blank Charm + Topaz = Bolt Charm
 * Cracked Crystal + Crystal Shard = Crystal Ball
 * Plain Ring + Opal = Ice Ring
 * Plain Ring + Tourmaline = Earth Ring
 * Plain Ring + Aquamarine = Water Ring
 * Plain Ring + Emerald = Wind Ring
 * Plain Ring + Ruby = Fire Ring
 * Blank Charm + Opal = Frost Charm
 * Blank Charm + Tourmaline = Quake Charm
 * Enerfly + Enefly = Betterfly
 * Blank Charm + Aquamarine = Flood Charm
 * Clenzall + Yellowed Sash = Heavenly Sash
 * Castelius I + Platinum Bar = Castelius Max
 * Rhinoggin + Unbeatable Soul = Rhinormous
 * Frostina + Glacial Clip = Blizzaria
 * Cupistol + Love Buster = Casanuva
 * Timidevil]] + Shard of Evil = Beelzebold
 * Shmoopie + Love Scepter = Pinkipoo
 * Hidabat + Tengloom = Abodabat
 * Grumples + Ageless Powder = Everfore
 * Holy Water + Dingy Scale = Ancient Scale
 * Manjimutt + Manjimutt = Multimutt
 * Chansin + Cursed Blade = Snee
 * Noko + Drop of Joy = Bloominoko
 * Chansin + Holy Blade = Gleam
 * Jibanyan + Coughkoff = Thornyan
 * Dulluma + Mochismo = Darumacho
 * Tattletell + Lafalotta = Tattlecast
 * Castelius III + Castelius III = Castelius II
 * Draggie + Dragon Orb = Dragon Lord
 * Dazzabel + Cupistol = Rattelle
 * Jibanyan + Roughraff = Baddinyan
 * Blank Charm + Emerald = Storm Charm
 * Blank Charm + Ruby = Blaze Charm
 * Helmsman + Armsman = Reuknight
 * Happierre + Dismarelda = Reversa
 * Beetler + General's Soul = Beetall
 * -|Yo-kai Fusions=
 * Ake + Buff Weight = Payn
 * Pupsicle + Snowstorm Cloak = Chilhuahua
 * Castelius II + Castelius II = Castelius I
 * Chansin + Legendary Blade = Sheen
 * Signibble + GHz Orb = Signiton
 * Enerfly + Enefly = Betterfly
 * Castelius I + Platinum Bar = Castelius Max
 * Rhinoggin + Unbeatable Soul = Rhinormous
 * Frostina + Glacial Clip = Blizzaria
 * Cupistol + Love Buster = Casanuva
 * Timidevil + Shard of Evil = Beelzebold
 * Shmoopie + Love Scepter = Pinkipoo
 * Hidabat + Tengloom = Abodabat
 * Grumples + Ageless Powder = Everfore
 * Manjimutt + Manjimutt = Multimutt
 * Chansin + Cursed Blade = Snee
 * Noko + Drop of Joy = Bloominoko
 * Chansin + Holy Blade = Gleam
 * Jibanyan + Coughkoff = Thornyan
 * Dulluma + Mochismo = Darumacho
 * Tattletell + Lafalotta = Tattlecast
 * Castelius III + Castelius III = Castelius II
 * Draggie + Dragon Orb = Dragon Lord
 * Dazzabel + Cupistol = Rattelle
 * Jibanyan + Roughraff = Baddinyan
 * Helmsman + Armsman = Reuknight
 * Happierre + Dismarelda = Reversa
 * Beetler + General's Soul = Beetall
 * -|Equipment Fusions=
 * Venoct Aura + Tattered Gauntlet = Venoct Gauntlet
 * Plain Ring + Topaz = Lightning Ring
 * Blank Charm + Topaz = Bolt Charm
 * Cracked Crystal + Crystal Shard = Crystal Ball
 * Plain Ring + Opal = Ice Ring
 * Plain Ring + Tourmaline = Earth Ring
 * Plain Ring + Aquamarine = Water Ring
 * Plain Ring + Emerald = Wind Ring
 * Plain Ring + Ruby = Fire Ring
 * Blank Charm + Opal = Frost Charm
 * Blank Charm + Tourmaline = Quake Charm
 * Blank Charm + Aquamarine = Flood Charm
 * Clenzall + Yellowed Sash = Heavenly Sash
 * Holy Water + Dingy Scale = Ancient Scale
 * Blank Charm + Emerald = Storm Charm
 * Blank Charm + Ruby = Blaze Charm

Yo-kai Watch 2

 * -|All Fusions=
 * Rhinoggin + Unbeatable Soul = Rhinormous
 * Ake + Buff Weight = Payn
 * Chansin + Legendary Blade = Sheen
 * Chansin + Cursed Blade = Snee
 * Chansin + Holy Blade = Gleam
 * Slumberhog + Goldfish Lantern = Snortlehog
 * Battered Blade + Sublime Whetstone = Holy Blade
 * Mermaidyn + Mermaid Pearl = Mermadonna
 * Nasty Medicine + Bitter Herb = Bitter Medicine
 * Grumpus Khan + Carved Bear = Groupus Khan
 * Hissfit + Raging Blade = Zerberker
 * Pupsicle + Snowstorm Cloak = Chilhuahua
 * Broken Bell + Strength Talisman = Beefy Bell
 * Takoyakid + Takoyaki Tray = Takoyaking
 * Signibble + GHz Orb = Signiton
 * Whateverest + Terracotta Figure = Whatuption
 * Happycane + Red Hibiscus = Starrycane
 * Panja Pupil + Master's Lantern = Panja Pro
 * Helmsman + Armsman = Reuknight
 * Squeeky + Horn = Rawry
 * Frostina + Glacial Clip = Blizzaria
 * Sandmeh + Sand Suit = Mister Sandmeh
 * Sumodon + Vintage Parasol = Yokozudon
 * Flushback + Mem-o-Vac = Vacuumory
 * Dazzabel + Cupistol = Rattelle
 * Shmoopie + Love Scepter = Pinkipoo
 * Tongus + Shmoopie = Nurse Tongus
 * Hidabat + Tengloom = Abodabat
 * No-Go Kart + Ledballoon = Mistank
 * Wydeawake + Hidabat = Allnyta
 * Danke Sand + Dune Sand =No Sandkyu
 * Broken Bell + Speed Talisman = Speed Bell
 * Grumples + Ageless Powder = Everfore
 * Draggie + Dragon Orb = Dragon Lord
 * Pallysol + Mad Mountain = Scarasol
 * Hungorge + Love-Packed Rice Ball = Hungorge
 * Cupistol + Love Buster = Casanuva
 * Timidevil + Shard of Evil = Beelzebold
 * Beetler + General's Soul = Beetall
 * Predictabull + Ethereal Water = Smashibull
 * Battered Blade + Sinister Whetstone = Cursed Blade
 * Battered Blade + Rough Whetstone = Legendary Blade
 * Broken Bell + Spirit Talisman = Spell Bell
 * Broken Bell + Defense Talisman = Tough Bell
 * Mirapo + Espy = Miradox
 * Samureel + Gold Emblem = Time Keeler
 * Healing Herb + Stinky Herb = Nasty Medicine
 * Castelius I + Platinum Bar = Castelius Max
 * Castelius II + Castelius II = Castelius I
 * Toiletta + Cursed Journal = Foiletta
 * Castelius III + Castelius III = Castelius II
 * Dulluma + Mochismo = Darumacho
 * Wotchagot + Papa Windbag = Pride Shrimp
 * Enerfly + Enefly = Betterfly
 * Fidgephant + Touphant = Enduriphant
 * Herbiboy + Blazion = Carniboy
 * Happierre + Dismarelda = Reversa
 * -|Yo-kai Fusions=
 * Rhinoggin + Unbeatable Soul = Rhinormous
 * Ake + Buff Weight = Payn
 * Chansin + Legendary Blade = Sheen
 * Chansin + Cursed Blade = Snee
 * Chansin + Holy Blade = Gleam
 * Slumberhog + Goldfish Lantern = Snortlehog
 * Grumpus Khan + Carved Bear = Groupus Khan
 * Hissfit + Raging Blade = Zerberker
 * Pupsicle + Snowstorm Cloak = Chilhuahua
 * Takoyakid + Takoyaki Tray = Takoyaking
 * Signibble + GHz Orb = Signiton
 * Whateverest + Terracotta Figure = Whatuption
 * Happycane + Red Hibiscus = Starrycane
 * Panja Pupil + Master's Lantern = Panja Pro
 * Helmsman + Armsman = Reuknight
 * Squeeky + Horn = Rawry
 * Frostina + Glacial Clip = Blizzaria
 * Sandmeh + Sand Suit = Mister Sandmeh
 * Sumodon + Vintage Parasol = Yokozudon
 * Flushback + Mem-o-Vac = Vacuumory
 * Dazzabel + Cupistol = Rattelle
 * Shmoopie + Love Scepter = Pinkipoo
 * Tongus + Shmoopie = Nurse Tongus
 * No-Go Kart + Ledballoon = Mistank
 * Wydeawake + Hidabat = Allnyta
 * Grumples + Ageless Powder = Everfore
 * Draggie + Dragon Orb = Dragon Lord
 * Pallysol + Mad Mountain = Scarasol
 * Hungorge + Love-Packed Rice Ball = Hungorge
 * Cupistol + Love Buster = Casanuva
 * Timidevil + Shard of Evil = Beelzebold
 * Beetler + General's Soul = Beetall
 * Predictabull + Ethereal Water = Smashibull
 * Mirapo + Espy = Miradox
 * Samureel + Gold Emblem = Time Keeler
 * Castelius I + Platinum Bar = Castelius Max
 * Castelius II + Castelius II = Castelius I
 * Toiletta + Cursed Journal = Foiletta
 * Castelius III + Castelius III = Castelius II
 * Dulluma + Mochismo = Darumacho
 * Wotchagot + Papa Windbag = Pride Shrimp
 * Enerfly + Enefly = Betterfly
 * Fidgephant + Touphant = Enduriphant
 * Herbiboy + Blazion = Carniboy
 * Happierre + Dismarelda = Reversa
 * -|Item Fusions=
 * Battered Blade + Sublime Whetstone = Holy Blade
 * Nasty Medicine + Bitter Herb = Bitter Medicine
 * Battered Blade + Sinister Whetstone = Cursed Blade
 * Battered Blade + Rough Whetstone = Legendary Blade
 * Healing Herb + Stinky Herb = Nasty Medicine
 * -|Equipment Fusions=
 * Broken Bell + Strength Talisman = Beefy Bell
 * Broken Bell + Speed Talisman = Speed Bell
 * Broken Bell + Spirit Talisman = Spell Bell
 * Broken Bell + Defense Talisman = Tough Bell

In other languages

 * Italian: Fusione