v2: How likely is Ash's Greninja for his anime set after "The Rainbow and the Pokémon Master!"? Why?

MrCarle

Back in the beginning of the Pokémon XY main animated series, Ash has caught Froakie, the one that was disobediently estranged from its unknown former original Trainer. Ash's Froakie has evolved into Frogadier, and then later into Greninja, the one with its Ash-Greninja bond phenomenon for its temp. trransformation, prior to Ash releasing at the end of the XY main animated series. Later in the Journeys main animated series, Ash has reunited with his formerly Trained Greninja, even though Greninja had not been able to rejoin his party because of it being already too full of his Pikachu, Dragonite, Gengar, Lucario, Sirfetch'd and Dracovish. Ash's formerly trained Greninja made its final physical main animated TV appearance as in the Journeys episode, "Whittle While You Work!". Ash's formerly Trained Greninja had seemed to physically disappear in the To Be a Pokémon Master sub-season, even though it had appeared only in Ash's flashback as in "The Same Moon, Now and Forever!". By the way, how likely do you think his Ash's formerly trained Greninja for his anime set after "The Rainbow and the Pokémon Master!"? Why? So please let me know, thanks.😉