https://tcm.pokecharms.com/For me it was this team in Emerald (tied with Crystal as my favorite Pokemon game) sometime during 5th gen when I was getting back in Pokemon.
Blaziken is my favorite 3rd gen starter. Gardevoir and Absol are my favorite Pokemon of all time. Aggron was/is always reliable. Salamence because I couldnt get Latias in the hack I was playing but it didnt matter, Salamence wrecked house. And getting Milotic solidified my return to Pokemon and it became my favorite water Pokemon.