They're as strong as cham chowder.
There are four and a champion.
It's the same as Pokemon gold and crystal. Elite four Pokemon are between levels 40-50.
compleat the elite four
by beating the Elite four. no i TRIED THAT ass
just like gold or silver
victory road
You can use a strong Pokemon to hit all the Elite four's Pokemon and champion Lance's Pokemon (in HeartGold). It depends on your Pokemon level but you can use ice types to beat Lance's Pokemons so it's easy to beat Lance.
Yes
nothing
They are still in the Pokemon league
they should be lvl 55-62
Go to new bark sail in the water that is by your house.