<noinclude>{{forum}}{{see also|Soulcery|Fusion}}</noinclude>[[Souls]] can be fused to make them more powerful. When you fuse 2 souls, the first soul becomes more powerful while you lose the 2nd soul. When the soul's EXP bar fills up, it levels up. Your soul gains bonus EXP from fusion if you fuse 2 souls of same type. ===Special Soul Fusions===Fusing certain Souls will create a brand new Soul.
{| class="wikitable sortable" style= "text-align: center"
|-
! Result Soul Effect
|-
|[[BlazionSoul]] || [[FlamuriceSoul]] || [[Fire Soul]] || align = "left" | The holder's [[Attack]] gains [[Fire]] [[Attribute]].
|-
|[[AppakSoul]] || [[ChummerSoul]] || [[Water Soul]] || align = "left" | The holder's Attack gains [[Water]] Attribute.
|-
|[[PupsicleSoul]] || [[DraaaginSoul]] || [[Ice Soul]] || align = "left" | The holder's Attack gains [[Ice]] Attribute.
|-
|[[FrazzelSoul]] || [[KomigerSoul]] || [[Lightning Soul]] || align = "left" | The holder's Attack gains [[Lightning]] Attribute.
|-
|[[AbodabatSoul]] || [[BlandonSoul]] || [[Wind Soul]] || align = "left" | The holder's Attack gains [[Wind]] Attribute.
|-
|[[MistankSoul]] || [[Mr. Mister SandmehSoul]] || [[Earth Soul]] || align = "left" | The holder's Attack gains [[Earth]] Attribute.
|-
|[[SwelterrierSoul]] || [[TunaticSoul]] || [[Incinerate Soul]] || align = "left" | The holder's [[Technique]] becomes [[Incinerate]].
|-
|[[Faux KappaSoul]] || [[DrizzleSoul]] || [[Waterfall Soul]] || align = "left" | The holder's Technique becomes [[Waterfall]].
|-
|[[BlizzariaSoul]] || [[AlhailSoul]] || [[Blizzard Soul]] || align = "left" | The holder's Technique becomes [[Blizzard]].
|-
|[[TenguSoul]] || [[SmogmellaSoul]] || [[Tornado Soul]] || align = "left" | The holder's Technique becomes [[Tornado]].
|-
|[[Sir BerusSoul]] || [[EyesoarSoul]] || [[Meteor Soul]] || align = "left" | The holder's Technique becomes [[Meteor]].
|-
|[[SignitonSoul]] || [[StatikingSoul]] || [[Voltage Soul]] || align = "left" | The holder's Technique becomes [[Voltage]].
|-
|[[BoyclopsSoul]] || [[FaysoffSoul]] || [[Neutral Soul]] || align = "left" | Enemy Techniques have no [[Attribute]].
|-
|[[ScarasolSoul]] || [[ImpassSoul]] || [[Guard Soul]] || align = "left" | The holder will only [[Guard]].
|-
|[[HeheheelSoul]] || [[CroongerSoul]] || [[Jar Guard Soul]] || align = "left" | The holder takes less damage when Guarding.
|-
|[[AllnytaSoul]] || [[GreeselSoul]] || [[Dark Soul]] || align = "left" | The holder's [[Inspirit]]s never miss.
|-
|[[PinkipooSoul]] || [[CupistolSoul]] || [[Superstar Soul]] || align = "left" | Increases chances of befriending enemy Yo-kai. Does not stack with [[Popularity]].
|-
|[[BeetallSoul]] || [[RhinormousSoul]] || [[Sparta Soul]] || align = "left" | Allies will not [[Loaf]].
|-
|[[SnagglySoul]] || [[WhinonaSoul]] || [[Aggravated Soul]] || align = "left" | The enemy's Yo-kai become more difficult to [[Purify]].
|-
|[[DazzabelSoul]] || [[LeadoniSoul]] || [[Stinging Soul]] || align = "left" | The holder gains a permanent [[Taunt]], forcing all enemies to target it.
|-
|[[Ol' FortuneSoul]] || [[ChilhuahuaSoul]] || [[Pierce Soul]] || align = "left" | The holder's attacks pierce [[resistances]].
|-
|[[DimmySoul]] || [[BlandonSoul]] || [[Ninja Soul]] || align = "left" | The holder gains permanent [[Stealth]], preventing enemies from targeting it.
|-
|[[ChymeraSoul]] || [[NekidspeedSoul]] || [[Speed of Light Soul]] || align = "left" | The holder gains a preemptive attack the first time they are in the front line.
|-
|[[SweltonSoul]] || [[MirapoSoul]] || [[Smooth Oil Soul]] || align = "left" | The player can spin their wheel for a longer time. Negates [[Spin-no-rama]]. b|[[N'more]] || [[Furdinand]] || [[Hades Soul]] || align = "left" | Enemy [[Restoration]] Techniques are weakened. |-|[[Pandanoko]] || [[Hurchin]] || [[Wisp Soul]] || align = "left" | [[Wisps]] appear more often. Does not work in multiplayer battles.
|-
|[[N'more Soul]] || [[Furdinand Soul]] || [[Hades Soul]] || align = "left" | Enemy [[Restoration]] Techniques are weakened.|-|[[Pandanoko Soul]] || [[Hurchin Soul]] || [[Wisp Soul]] || align = "left" | [[Wisps]] appear more often. Does not work in multiplayer battles.|-|[[RobonyanSoul]] || [[HornaplentySoul]] || [[Guarding Soul]] || align = "left" | When rotating into the front line, the holder will guard.
|-
|}