How do you get easy rare techniques on sonic battle

what i know is when you defeat any enemy (like cream) and don´t get any punch( you´ve got a good chance with emerls knockout combo cards) you eventually get a rare crad but normal you must go to the Virtual training of tails and on that rounds you usually get a rare card: 5;10;15;20;25;30...... when you get all these rare cards(i don´t have them i only 12) then having fun emerl is so cool then^^ PS: I hope that was helpful for you the codes of rare cards of sonic team you can google give the following words in: Sonic Battle Sonic Team Codes and then you find usually many of sites where you can read it ^^