Depends if you only beat him once when his Pokemon around level 50's go train on route 12+ because once you come back after covering these rountes his Pokemon are in the 70's.
After you beat him a second time you can catch all the Pokemon, collect shinies, gather level 100's, and battle people on wifi.
Alder is only in pokemon black or white.
trainer n he beats alder
shoot alder with a gun
at the end of it
you can do is cat the 3 legend Pokemon
The Champion in Pokemon Black and White is only after you have defeated N and Ghetsis For the final time. Then the second time you battle the Elite Four/Pokemon League, You will battle Champion Alder. All his Pokemon are Lv 75.
Yes
Alder and Cynthia(from platinum)
It's on Twist Mountain where Alder will give it to you.
you get from alder at twist mountain.
I don't know. Maybe his pokemon was old or something.
alder will give it to you before you enter twist mountain