Both Leon Powalski and Panther Caroso are voiced by David Scully (aka Dimitri from Sly Cooper series). In the Japanese version, seiyuu Yusuke Yumata voices both Andrew and ROB 64, while Hirohiko Kakegawa does Beltino, Tricky, and James.
Averted with Wolf and Fox; Shinobu Satouchi voiced Fox and Leon in 64; Satouchi now only has Leon, while Kenji Nojima now voices Fox. Similarly, Hisao Egawa did both Falco and Wolf; now Mahito Oba voices Wolf.
Krystal and the aparoid queen's (real) voice are voiced by Alesia Glidewell (aka Carmelita from Sly Cooper series).