Nope.
No.
the freedom fighters doesn't know shadow the hedgehog
Yes, multiple times.
Shadow is a Hedgehog like Sonic the Hedgehog. He died but Dr. Robotnik (Eggman) made a Andriod copy of Shadow the Hedgehog. Shadow is always grumpy. But if he ever forgets who he is he will do anything to get his memory back. Even destroy Sonic the Hedgehog.
some day may be with a morttal hedgehog like him may be shadow does need a girlfriend
No
dude never shadow is beast
mite be soon in a year or two
no he was created by Dr. Gerald Robotnik
Not in the actual games, last time I checked. A LOT in Fanfiction and the like.
Everything has its end, even though Shadow the Hedgehog said to be immortal, if he were to live until the world ended, he would die along with the world.
No, he has a few flashbacks but due to discontinuation of the series, Shadow does not figure out his past.