User blog comment:SnowyBoy/Inazuma Eleven 2 : Blizzard/@comment-84.25.10.159-20120416134331/@comment-4703969-20120418153051

I can answer it directly here ;) There is no way to get him after Fubuki becomes 'perfect' in the second game.

You can get Atsuya in the third game, though: you have to superlink Fubuki and Someoka at LV 50 with Wolf Legend at G2 or higher in order to get him.