The gold and black Krark. The body has the same colour than the (suppoosed to be) Ghost, and the wings has the same colour than the F2.

Here is what could be said about the Ghost Zoids, on Phenotype :

The translucent Zoids you have pictured in your guide were part of a Zoid-designing contest. Different areas had different Zoids as prizes so I'll give you a list of what have managed to find out.

Area 1 (Zoids coloured gold and black)
1st Prize = Zabre, Shield Tiger and Krark
2nd Prize = Unknown
3rd Prize = Unknown

Area 2 (Zoids in regular colours)
1st Prize = Complete set of Super 1000 Zoids
2nd Prize = Set of Super 1000 Zoids excluding Shield Tiger and Spinefin
3rd Prize = Unknown

Area 3 (Zoids coloured translucent and black/silver)
1st Prize = Zoidzilla, Krark, Zark, Znake and Tarantulon
2nd Prize = Zark, Znake and Tarantulon
3rd Prize = Choice of Zark, Znake or Tarantulon

Area 4 (Zoids coloured translucent and black/silver)
1st Prize = Unknown (2nd prize may infact be the 1st prize, if so i'm unsure of the 3rd prize)
2nd Prize = Zabre, Redhorn and Shield Tiger
3rd Prize = Choice of Zabre, Redhorn or Shield Tiger

All of this takes part in the GHOST THEORY.