Yes, you do, in the same place as it is in Pokemon Pearl/Diamond.
they are in the Pokemon league.
The Elite Four
to the elite four.
No
Yes,you can trade with perl,diamond,platinum and soul silver.You can trade before beating the elite four.
I think its Bertha of the Elite four.
by passing the game
40s and 50s
you beat the elite four
you cant, it's impossible
Behind the ELite FOur place.
Explaining how to go to Zhery Elite Four in Pokemon Light Platinum is difficult because it will be such a detailed explanation. Youtube has some great videos about this.