"The Galladeiator"
It would be a story about how Brock is really depressed about no woman liking him back.
Later, Ash and Co. meet a female trainer who has a Gardevoir and a Gallade. The Gallade is deeply in love with the Gardevoir but she shows no interest. Instead, she starts showing an interest in none other than our love-deprived Brock.
Brock is absolutely shocked when she clings to him, Ash and Dawn freak out, and Gallade gets angry. Meanwhile, Team Rocket plans to steal both Gardevoir and Gallade and give them to the boss as usual.
The next day, while in the woods, Team Rocket shows up and steals Gardevoir, putting her in a psychic-stopping cage. When they try to steal Gallade, he fends them off and goes on to save Gardevoir. Their robot starts flying, and Gallade manages to get Gardevoir out and save her. When Team Rocket's robot lands again, Gallade blasts them off with a Psycho Cut attack.
Gardevoir is touched and she finally falls for Gallade.
Later, Ash and Co. say goodbye and as they are walking, Brock stills comments on how unlucky he is, and Dawn says that someday he'll find someone who is special. Then they walk off into the sunset.
THE END!