No, currently Delphox cannot Mega Evolve or evolve into any other form.
Braixen will evolve at level 36 into its final form - the Fire-Psychic-type, Delphox.
No, Surskit cannot Mega Evolve, but it can normally evolve into Masquerain at level 22.
Xerneas does not have a Mega Evolution.
No. Braviary does NOT evolve, although it evolves from Rufflet.
Not normally, but they can evolve into their Mega Evolution forms in battle through the use of their respective Mega Stones.
Braixen evolves into Delphox at level 36.
Braixen will evolve at level 36 into its final form - the Fire-Psychic-type, Delphox.
No, Surskit cannot Mega Evolve, but it can normally evolve into Masquerain at level 22.
Have it hold the Sceptilite, then press "Mega Evolution" during a battle to Mega Evolve it.
Xerneas does not have a Mega Evolution.
No. Braviary does NOT evolve, although it evolves from Rufflet.
Pinser in Pokemon does not evolve into any other creature. Pinser does evolve into a Mega Pokemon using the Mega Stone at any level.
Not normally, but they can evolve into their Mega Evolution forms in battle through the use of their respective Mega Stones.
Mega charizard
Mewtwo is the ultimate Psychic type legendary Pokemon. It was introduced in the first generation and does not evolve into any other Pokemon, although as of the sixth generation it can mega evolve into Mega Mewtwo X or Mega Mewtwo Y.
Aerodactyl can only Mega Evolve into Mega Aerodactyl. Permanently, Aerodactyl cannot evolve any further.
Mewtwo can Mega Evolve into either Mega Mewtwo Y or Mega Mewtwo X.