I am going to get Pokemon Pearl but don't know what other game to get.

the games I think could be good are supersonic warriors 2, portrait of ruin, Dawn of sorrow, New Super Mario Bros,is the pheonix wright series good?, people who played under the knife should I get it? from all of these, which should I get?

Please be honest and please give your opinons on games. Remember I can get another game not two other games.(so its pearl and whatever you guys tell me is the best from those games or games YOU think should be added to the list)