Year Released: 2005
Mortal Kombat Wave 4 was what you might call a "best of" series. It featured a different color scheme on the card, which I like to think is reminiscent of Mortal Kombat II. Figures included were Sub Zero, Scorpion, Raiden, and Baraka.
Known differences: Raiden had white eyes, as opposed to black eyes in the first release. The golden part of Raidens costume is more brightly.
Baraka's skin looks different to the first release.
Sub-Zero, unknown differents. Scorpion, unknown differents.