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Lightside (Japanese: ライトサイド Raito Saido) and Shadowside (Japanese: シャドウサイド Shadou Saido) are the forms taken by the Yo-kai in Yo-kai Watch Shadowside and the movie prior to the series.


Lightside and Shadowside forms are two different yet related appearances most Yo-kai can assume either willingly or through the use of the Yo-kai Arks and the Yo-kai Watch Elda by its accepted human.

Lightside forms are the standard form used by Yo-kai outside of battle in most cases; this form serves as the new standard form for Yo-kai in a similar manner to present Yo-kai, and as such this form allows for normal communications with humans, for it has a much friendlier physical appearance. Shadowside forms, on the other hand, are mostly used for combat, and as such most Yo-kai in this form assume a much fiercer-looking and monstrous form than the Lightside form, in addition to being more suited by combat. In both forms, the voices, as well as some personality traits of most Yo-kai, are notably different from each other.

In some occasions, such as Jibanyan, some Yo-kai can revert to their original selves upon experiencing a strong influx of memories related to their previous selves, implying that the transition can be reversible, albeit temporarily.

The phenomena of Lightside or Shadowside forms began at some point in the 30 years prior to the Shadowside movie and series; however, the exact circumstances, as well as the nature on how the transition began, are so far unknown.

Notably, Yo-kai from the original series (with some exceptions like Slimamander/Micchy), retain their original names, and simply distinguish each form by adding Lightside or Shadowside depending on it (in PuniPuni, these terms are shortened to Light and Shadow, alluding to the words when a Yo-kai Ark is turned on either side). Yo-kai which first appear in the Shadowside series (with exceptions like Robonyan 00) have two different names to distinguish each form.

In Yo-kai Watch 4, the mechanics are used in the following ways:

  • When viewing a shadowside Yo-kai in the Medallium, you can press the R joystick to change forms.
  • When in battle, if a Yo-kai is in its Lightside form, it can change into shadowside via pressing X+a while playing as it with a full Soultimate gauge, after which, it will revert after a while. While in their Shadowside forms, the yo-kai can unleash a soultimate via pressing X=A again.

List of Yo-kai

Onnen tribe

Lightside Shadowside
BlizzariaLightside BlizzariaArk-Light BlizzariaShadowside BlizzariaArk-Shadow
Fubuki-hime Fubuki-hime
??? Sekka no Fubuki-hime Ark (L) ??? Sekka no Fubuki-hime Ark (S)
Sekka no Fubuki-hime Sekka no Fubuki-hime
??? DamonaArk-0 ??? DamonaArk (S)
Hyakki-hime Hyakki-hime
Hungramps (Light) Hungramps Hungramps (Shadow) HungrampsSS
Himoji Himoji
PakkunLight Pakkun PakkunShadow Gaburiel (Pakkun)
Pakkun Gabriel
Mushbarber MushbarberArk-Light JokerTheRipper Kirisaki Joker (Mushbarber)Ark-Shadow
Mushbarber Kirisaki Joker
KamamotoAtsushi AtsushiKamamotoArk Kamadouma KamadoumaArk
Atsushi Kamamoto Kamadouma
Dme4cE8VsAAiAL2 Leon Ark (L) Dme4-aPU8AAonJD Dr. Chameleon Ark (S)
Leon Dr. Chameleon
Poofessor (lightside) UnchikumaArk Poofessor UnchikumaArk(S)
Unchikuma Unchikuma
Sebas-chan Sebas-chanArk Sebas-san Sebas-sanArk
Sebas-chan Sebas-san
Momi MomyArk (L) Momi (shadowside) Hitotsuri Momi-no-kiArk (S)
Momy Hitotsuri Momi-no-ki
ChiyokoNew ChiyokoArk (L) Jogora JogoraArk (S)
Chiyoko Jogora
Yamamba Lightside Yamambaa Ark (L) Yamamba (S) Yamamba Ark (S)


Kyunshii KyushiArk (L) Zukkyunshii ZukkyuArk (S)
Kyunshii Zukkyunshii
Hare-onna HaronnArk (L) Ame-onna AmeonnArk (S)
Hare-onna Ame-onna

Goriki tribe

Lightside Shadowside
BlazionLightside BlazionLS BlazionShadowside BlazionSS
Merameraion Merameraion
??? Sakigake Merameraion Ark (L) ??? Sakigake Merameraion Ark (S)
Sakigake Merameraion Sakigake Merameraion
PapaBoltLightside Papa Bolt Ark (L) PapaBoltShadowside Papa Bolt Ark (S)
Rai Oton Rai Oton
??? TodorokiRaiOtonArk ??? TodorokiRaiOtonArk(S)
Todoroki Rai Oton Todoroki Rai Oton
LSOrochi VenoctLS SSOrochi VenoctSS
Orochi Orochi
??? Hakuryu OrochiArk (L) ??? Hakuryu OrochiArk (S)
Hakuryu Orochi Hakuryu Orochi
??? KageOrochiArk ??? KageOrochiArk(S)
Kage Orochi Kage Orochi
??? Arachnus Ark (L) ??? Arachnus Ark (S)
Tsuchigumo Tsuchigumo
LightSideBushinyan Shogunyan Ark (L) ??? Shogunyan Ark (S)
Bushinyan Bushinyan
??? ShurakomaArk ??? ShurakomaArk(S)
Shurakoma Shurakoma
Jianta (Lightside) JiiArk (Correct Tribe) (L) Satan Claus SatanArk (Correct Tribe) (S)
Jii-tan Satan Claus

Omamori tribe

Lightside Shadowside
Komasan (Light) KomasanArk-Lightside Komasan (Shadow) KomasanArk-Shadowside
Komasan Komasan
??? Koumou no Komasan ??? Koumou no Komasan-Shadow
Koumou no Komasan Koumou no Komasan
Komajiro ss Komajiro Ark (L) KomajiroSS-New Komajiro Ark (S)
Komajiro Komajiro
AzureDragonLightside Azure Dragon Azure Dragon (Shadowside) Azure DragonSS
Seiryuu Seiryuu
??? Toadal Dude Ark (L) ??? Toadal Dude Ark (S)
Ogama Ogama
Noko (Lightside) Noko Ark (L) Noko (shadowside) Noko Ark (S)
Tsuchinoko Tsuchinoko
Banchou BanchoArk-Light Bourei Bancho Bourei BanchouArk-Shadow
Bancho Bourei Banchou
Honmaguro Taisho Honmaguro-taishouArk-Light Honmaguro Taisho (Shadowside) Magulodon (Honmaguro-taishou)Ark-Shadow
Honmaguro-taishou Magulodon
Ikarin Ikarin Ark (L) Gesodrill Gesodrill Ark (S)
Ikarin Gesodrill
Semicolon Semicolon Semilong Semilong (Semicolon)
Semicolon Semilong
Suu-san Suu-san ??? Suu-sanSS
Suu-san Suu-san
ZashikiwarashiM05 Gnomey Ark (L) ??? Gnomey Ark (S)
Zashiki-warashi Zashiki-warashi
Yamamba Lightside Yamambaa Ark (L) Yamamba (S) Yamamba Ark (S)
Yamambaa Yamamba*
Chokichi ChokichiArk (L) Yamikichi YamikichiArk (S)
Chokichi Yamikichi
Rai-chan RaichaArk (L) Raijin RaijinArk (S)
Rai-chan Raijin
Fuu-kun FuukunArk (L) Fuujin FuujinArk (S)
Fuu-kun Fuujin

Mononoke tribe

Lightside Shadowside
JibanyanLight JibanyanArk-Lightside JibanyanShadow JibanyanArk-Shadowside
Jibanyan Jibanyan
??? Mafura Jibanyan Ark (L) ??? Mafura Jibanyan Ark (S)
Mafura Jibanyan Mafura Jibanyan
Kyubi (Lightside) KyubiArk-Light Kyubi (Shadowside) KyubiArk-Shadow
Kyubi Kyubi
??? Kosen Kyubi ??? Kosen Kyubi SM
Kosen Kyubi Kosen Kyubi
??? InugamiArk ??? InugamiArk(S)
Inugami Inugami
Lucky LuckyArk-Light LuckyShadowside Dogman (Lucky)
Lucky Dogman
Inari Inari InariShadowside Tatarigitsune (Inari)
Inari Tatarigitsune
Shibumenken Shibumenken Ark (L) Menkueater Menkueater Ark (S)
Shibumenken Menkueater
Usakichi UsakichiArk (L) BunnyTrap Bunny TrapArk (S)
Usakichi Bunny Trap
Nekomata Artwork Nekomata Ark (Extreme Rare) (L) NEKO SHADOWSIDE Nekomata Ark (Extreme Rare) (S)
Nekomata Kaibyou Kamaitachi
Karasu Tengu (Lightside) Karasu Tengu Ark (L) ??? Karasu Tengu Ark (S)
Karasu Tengu Karasu Tengu
Tamamo no Mae (M05) Tamamo Ark (L) ??? Tamamo no Mae Ark (S)
Tamamo Tamamo no Mae
Uriko 2 UribouArk (L) Bamboo Grass King 2 InosasArk (S)
Uribou Inosasaou

Tsukumono tribe

Lightside Shadowside
Ungaikyo (L) UngaiArk (L) Ungaikyo (S) UngaiArk (S)
Ungaikyo Ungaikyo
Charlie Light CharlieArk-Light Charlie Shadow Ghostcycle (Charlie)Ark-Shadow
Charlie Ghostcycle
Zundoumaru Zundoumaru Ark (L) Zundoumaru(Shadowside) Shiryou no Dokudoku-nabe Ark (S)
Zundoumaru Shiryou no Dokudoku-nabe
Jinta New Jinta Jingeki Jingeki (Jinta)
Jinta Jingeki
Robonyan 00 (lightside) Robonyan 00 Robonyan 00 (Shadowside) Robonyan 00SS
Robonyan 00 Robonyan 00
Filmlin Filmlin Ark (L) Filmlin (Shadowside) Eigalien Ark (S)
Filmlin Eigalien
Hana Poncho Hana-chanArk Hana Poncho (Shadowside) Ohana-sanArk
Hana-chan Ohana-san
Ansenbouya Anzen-bouyaArk (L) Nitanita-san Nitanita-sanArk (S)
Anzen-bouya Nitanita-san
Shield of Brightness Shield of BrightnessArk (L) Darkness DarknessArk (S)
Shield of Brightness Darkness
Kantaro KantarArk (L) Jihanki JihnkiArk (S)
Kantaro Jihanki
Narikama NarkamArk (L) ??? NarkamArk (S)
Narikama Narikama

Uwanosora tribe

Lightside Shadowside
Junior Junior (Extreme Rare) Burning Dragon Burning Dragon (Junior)
Junior Burning Dragon
Junior JuniorArk (Chocobars) (L) Blizzard Wolf JuniorArk (Extreme Rare 2) (S)
Junior Blizzard Wolf
Micchy MicchyLS Slimamander (Shadow) Slimamander
Micchy Mitsumata Nozuchi
HyperMicchy Hyper Micchy Mitsumata Ghidorah Mitsumata Ghidorah (Hyper Micchy)
Hyper Micchy Mitsumata Ghidorah
Kappa M05 Kappa ??? KappaUnknownShadow
Kappa Kappa
Wiglin lightside Wakame-kunArk Wiglin (Shadowside) Wakame-kunArk(S)
Wakame-kun Wakame-kun
Steppa lightside Konbu-sanArk Steppa (Shadowside) Konbu-sanArk(S)
Konbu-san Konbu-san
Rhyth lightside Mekabu-chanArk Rhyth (Shadowside) Mekabu-chanArk(S)
Mekabu-chan Mekabu-chan
Goorse (Lightside) UmataroArk (L) Goorse (Shadowside) UmazuraArk (S)
Umataro Umazura
Hi no Shin (L) HinoArk (L) Hinozall Shadowside HinoArk (S)
Hi no Shin Hi no Shin


  • From SS033 to SS036, the Shadowside Yo-kai that were causing trouble were influenced by the Soranaki Virus.
  • It is currently the only mechanic that is added to Yo-kai Watch 4 so far.

Also see

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