Celebi-voice of the forest question???

hi,if youve seen the 4th movie, then can you tell me this
when the celebis heal bell on the dead celebi to revive it, are they other celebis or are they that celebi from the past/future???
my bro said its the same celebi from different times but im not sure

I think it's implied that they're different Celebi since Towa explained that the other Celebi (Spirits of the past and future or whatever) came to help a fallen friend and stuff.

I think their diff celebis.

I was shocked when i realied prof. oak was sammy

I always thought it was the same celebi, just from different times. Like whenever you see someone in a movie/book go back in time they might see themselves. I also thought sam being oak was a trip, but you sorta saw it coming.