A function first introduced in Pokémon Ruby & Sapphire, Pokémon Contests provide an extra way for you to train your Pokémon and test their powers. In Diamond & Pearl, they make a triumphant return, under the new tag of Super Contests. These contests are similar to the previous ones but with a few added extras.
There are three rounds to determine your success in the Pokémon Super Contests:

Visual Judgement

This round is similar to the first round in the main games, however instead of just relying on your PokéBlock stats, this time you have to physically dress your Pokémon up with a variety of items to try and get points. You do this via the touch screen and then when you are done you put your Pokémon out in front of the crowd and see what they think based on the type of contest that it is

Dance Judgement

The second round is a Dancing round. The Pokémon that you have entered the contest with either becomes the main singer or one of the background singers based on its performence in the last round. In this round, you get rated based on your rhythm and co-ordination with the music of the momnt. To control this, you press the 4 buttons on the touch screen to the music when instructed. The better your rhythm, the more points you get

Performence Judgement

The final round runs exactly the same as the main part of the contests in Ruby & Sapphire. You use attacks in here to try and get Appeal Points and Jam the points of the opponents. The person with the most points at the end of the 5 battle rounds wins this round