no he doesnt he just disappears
you have to go up to pikachu and give him head
if you beat somebody in a cave near mahogany town they will give you tyrouge
if you fully beat it (all 7 gold symbols) and talk to scott he will give you a starf berry
After you beat Whitney go to the flower shop and talk to the lady and she will give you a squirt bottle.
You have to go to the Kimono Girls house after you beat chuck and give Ampharos the medicine.
With Pokemon.
yes after you beat them you can defeat ash, his Pokemon are level 80, after you defeat him then you can go to a whole another region! Johto
beat chuck. then talk to chuck's wife near the gym. she'll give you fly.
after you beat the gym leader at goldenrod city go to the flower shop next to it the lady will give it to you
i beat them in heart gold by trading lv 100 dialga from diamond that worked well for me so give it a try
Nothing...I think you might be able to obtain Kyogre but I don't recall anything else :)
After you beat the gym, you must leave, heal ur pokemon, then go back and talk to the leader and she should give you the badge