Veronica did a great job at voicing ash giving him more character and emotion. Sarah's voicing like said earlier is too deep and her deliveries are bland. I think Kayzie rogers would have done a better job than sarah given some time.
Because it didnt exist before. The writers are megaevolving charizard for the sake of advertising the new games. i dont think megastones will be used. i think it would be activated during battles like infernapes blaze
Charizard was lazy and didnt respect ash. it only fought opponents that were worthy and strong enough to fight it. ash never disrespected or mistreated charizard. charizard could have flown away if ash mistreated it. but charizard didnt hate ash.