Battle Bond is one of the many abilities that are inheritable by Pokémon.
Function
When Greninja knocks-out a Pokémon, Battle Bond causes it to transform into Ash-Greninja. Greninja with Battle Bond was exclusive to the 2020 Halloween event and cannot be caught anymore.
Hidden ability
| # No. | Pokémon | Type 1 | Type 2 | Ability 1 | Ability 2 | Hidden Ability | |
|---|---|---|---|---|---|---|---|
| 658 |  |
Ash-Greninja | Water | Dark | Battle Bond |