Yes celebi can learn 10 moves. They are safe guard, magical leaf, acient power, baton pass, natual gift, heal block, future sight, healing wish, leaf song, and perish wish.
any fire type move but i reccommend flamethrower
Time Travel isn't a Pokemon move that Celebi learns at a certain level. It seems to just be an inherent ability, not something that it can use in battle.
The same moves that it can earn in any other Pokemon games.
There is no specific way to get through, just use a Pokemon that levels up fast ( i recommend mew, because it can learn any move, mewtwo, or kecleon)
No.
Yes, it can learn any move, but it has a limited moveset by leveling up. It can learn a new move every 10 levels, but it can learn any TM or HM available. It can also learn all the tutor attacks. This is a great Pokemon to have to build an ultimate moveset.
If that's a move then yes.
If you have the TM for Elegant Egotist, than Mew can learn that move.
At level 64
No. Froslass can't learn any HM moves. She can only learn TM moves.
The only Pokemon that can not learn a move is magikarp. Any Pokemon can learn at least one TM
Arceus is not able to learn any move like Mew can. However Arceus is able to learn a large amount of moves from TMs making it a very versatile Pokemon.