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Ash and his Greninja have perfected the transformation

Bond Phenomenon (Japanese: キズナ現象 Bond Phenomenon) is a transformation affecting Pokémon that was introduced in the XY series. It is said to have some connection to the Pokémon's hidden potential.

Unlike Mega Evolution or Primal Reversion, the transformation does not require any specific items for either the Trainer or the Pokémon. So far, the only known Pokémon to have this transformation is Greninja. In this form, the strength of Greninja's legs are superior to that of an ordinary Greninja. Additionally, it gains the ability to form large-sized Water Shurikens on its back.


Pokémon capable of Bond Phenomenon

Pokémon Before Bond Phenomenon After Bond Phenomenon
Image Type Ability Image Type Ability
Greninja Greninja  Water  Dark  Battle Bond Ash-Greninja  Water  Dark  Battle Bond

In the games

Bond Phenomenon made its core series debut in the form of a Greninja that can be transferred to Pokémon Sun and Moon from the Special Demo Version. This unique Greninja possesses the Battle Bond Ability, which triggers the transformation after the opposing Pokémon has fainted and increases the power of Water Shuriken. This alternate form is called Ash-Greninja (Japanese: サトシゲッコウガ Satoshi Gekkouga).

SM Special Demo Version
Water Dark
Battle Bond
Held item:
None.png None None.png
Greninja Lv.36
Water Shuriken
Water Special
Aerial Ace
Flying Physical
Double Team
Normal Status
Night Slash
Dark Physical

Ash-Greninja also appears in Pokémon Shuffle, Pokémon Picross, Pokémon Tretta, and Super Smash Bros. Ultimate.

In the anime

Depiction from the Ninja Village of a Greninja who achieved the transformation

In the Pokémon anime, Bond Phenomenon first appeared in A Festival of Decisions!, in which Ash's Frogadier evolved into Greninja and assumed the Ash-Greninja form. However, the transformation would not be addressed by name until Kalos League Passion with a Certain Flare!, in which Professor Sycamore, after researching the matter, reported his results to Ash and his friends.

In the anime, Bond Phenomenon may be achieved when the trust between the Trainer and the Pokémon reaches maximum. While a Pokémon and Trainer are using this form, the Trainer shares the Pokémon's pain in the same place the Pokémon was dealt damage. The Trainer can also share the Pokémon's point of view. If the form is not mastered, the Trainer and Pokémon can pass out from exhaustion.

In the TCG

In the Pokémon Trading Card Game, Ash's Greninja in its Ash-Greninja form is featured as a Promotional PokémonEX card.

Related cards
Cards listed with a blue background are only legal to use in the current Expanded format.
Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.
Card Type English
Rarity # Japanese
Rarity #
Ash-GreninjaEX Water XY Black Star Promos   XY133 XY-P Promotional cards   218/XY-P

In other languages

Language Title
Chinese Cantonese 牽絆現象 Hīnbuhn Yihnjeuhng
Mandarin 牽絆現象 / 牵绊现象 Qiānbàn Xiànxiàng
Denmark Flag.png Danish Følelsesmæssigt båndfenomen
The Netherlands Flag.png Dutch Vertrouwensbandfenomeen
Finland Flag.png Finnish Sideilmiö
France Flag.png French Phénomène de Synergie
Germany Flag.png German Freundschaftsphänomen
Italy Flag.png Italian Effetto Sintonia
South Korea Flag.png Korean 유대현상 Yudae Hyeonsang
Norway Flag.png Norwegian Følelsesmæssigt båndfenomen
Poland Flag.png Polish Zjawisko więzi
Portuguese Brazil Flag.png Brazil Fenômeno Vincular
Portugal Flag.png Portugal Fenómeno da ligação
Russia Flag.png Russian Узы доверия Uzy doveriya
Spanish CELAC Flag.png Latin America Sinergia afectiva
Spain Flag.png Spain Metamorfosis afectiva
Sweden Flag.png Swedish Starkt känslomässigt bandfenomen
Turkey Flag.png Turkish Bağ Fenomeni

See also