There is no Trainer Tower in Pokemon Pearl. It is only present in Pokemon Leafgreen and Firered and Pokemon Emerald. There is however, a Battle Tower in Pokemon Pearl which is basically the same as the battle towers in Pokemon Ruby, Sapphire, and Emerald.
battle tower
The battle frontier after the Pokemon League.
Battle Tower, if that's what you mean.
you have to go to the battle fronteir after you beat the game
havve the Pokemon to hold it then go to battle tower and dupliate
yes you can, you get to catch it after you complete the battle tower
At the battle frontier near the battle tower.
Pokemon Ruby and Pokemon Sapphire do not have the Battle Frontier, instead they only have the Battle Tower. It was not until Emerald version that the Battle Frontier was added to the game.
you clone your Pokemon at the battle tower by going to the PC and ....
You go into the battle tower in the battle frontier and go to the left then a little up and talk to him.
you cant cause its the end of Pokemon sapphire. but the game Pokemon emerald has the whole battle frontier.