Greninja's with the ability battle bond have Ash as their OT.
The Ash-Greninja form is based on Greninja's relationship with Ash.
Greninja's not literally Ash's Greninja (he's a trophy in the world where they fight) but he's a trophy based on an anime character rather than a game character. Or at best taking into account the SM Demo, he's a trophy game character based on an anime character. Like if Jessie and James made it into smash because they technically come from Yellow Version.
Greninja's with the ability battle bond have Ash as their OT.
The Ash-Greninja form is based on Greninja's relationship with Ash.
Greninja's not literally Ash's Greninja (he's a trophy in the world where they fight) but he's a trophy based on an anime character rather than a game character. Or at best taking into account the SM Demo, he's a trophy game character based on an anime character. Like if Jessie and James made it into smash because they technically come from Yellow Version.