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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.
| Soul 1 | Soul 2 | Result Soul | Result Soul Effect |
|---|---|---|---|
| Blazion | Flamurice | Fire Soul | The holder's Attack gains Fire Attribute. |
| Appak | Chummer | Water Soul | The holder's Attack gains Water Attribute. |
| Pupsicle | Draaagin | Ice Soul | The holder's Attack gains Ice Attribute. |
| Frazzel | Komiger | Lightning Soul | The holder's Attack gains Lightning Attribute. |
| Abodabat | Blandon | Wind Soul | The holder's Attack gains Wind Attribute. |
| Mistank | Mr. Sandmeh | Earth Soul | The holder's Attack gains Earth Attribute. |
| Swelterrier | Tunatic | Incinerate Soul | The holder's Technique becomes Incinerate. |
| Faux Kappa | Drizzle | Waterfall Soul | The holder's Technique becomes Waterfall. |
| Blizzaria | Alhail | Blizzard Soul | The holder's Technique becomes Blizzard. |
| Tengu | Smogmella | Tornado Soul | The holder's Technique becomes Tornado. |
| Sir Berus | Eyesoar | Meteor Soul | The holder's Technique becomes Meteor. |
| Signiton | Statiking | Voltage Soul | The holder's Technique becomes Voltage. |
| Boyclops | Faysoff | Neutral Soul | Enemy Techniques have no Attribute. |
| Scarasol | Impass | Guard Soul | The holder will only Guard. |
| Heheheel | Croonger | Jar Guard Soul | The holder takes less damage when Guarding. |
| Allnyta | Greesel | Dark Soul | The holder's Inspirits never miss. |
| Pinkipoo | Cupistol | Superstar Soul | Increases chances of befriending enemy Yo-kai. Does not stack with Popularity. |
| Beetall | Rhinormous | Sparta Soul | Allies will not Loaf. |
| Snaggly | Whinona | Aggravated Soul | The enemy's Yo-kai become more difficult to Purify. |
| Dazzabel | Leadoni | Stinging Soul | The holder gains a permanent Taunt, forcing all enemies to target it. |
| Ol' Fortune | Chilhuahua | Pierce Soul | The holder's attacks pierce resistances. |
| Dimmy | Blandon | Ninja Soul | The holder gains permanent Stealth, preventing enemies from targeting it. |
| Chymera | Nekidspeed | Speed of Light Soul | The holder gains a preemptive attack the first time they are in the front line. |
| Swelton | Mirapo | Smooth Oil Soul | The player can spin their wheel for a longer time. Negates Spin-no-rama. |
| N'more | Furdinand | Hades Soul | Enemy Restoration Techniques are weakened. |
| Pandanoko | Hurchin | Wisp Soul | Wisps appear more often. Does not work in multiplayer battles. |
| Robonyan | Hornaplenty | Guarding Soul | When rotating into the front line, the holder will guard. |