Yes, he comes back and you can fight him again after beating the elite 4. Whenever you beat the elite 4 it kinda resets Red.
You cannot fight the Gym Leaders again in Pokémon Black after defeating them and being awarded their Gym Badges.
No
You speak to a fisherman in the Fight Area after defeating the Elite Four (?)
yes. after defeating again Dr. Zombos, there is a stage where you will fight the yeti zombie
You can't
After you beat Candice go to mount courenet and fight team galactic
It might depend on the Pokemon, though usually you can face legendary Pokemon again if you beat the Champion.
you can't. you can only fight the Pokemon league again.
I believe he sets out on his own adventure. It is not possible to fight him again, and you wont find him anywhere in Soul Silver.
The Super Rod can be obtained by a Fisherman in the Fight Area. The Fight Area can be accessed after completing the Sinnoh Pokedex and defeating the Elite Four.
you can go after the legendary pokemon, or beat him again.
Figure out something to do: Fight trainers you haven't fought yet Fight the Elite 4 again Catch more pokemon Do the game again!