As far as I can tell, Skystorms were only discernible in 2 panels of 1 issue: #119 in Dec. 1991.
Desert Fox 6 W.D.
- Tan 6-wheeled jeep with rear machine gun station, used by G.I. Joe.
- Boxed vehicle from spring 1988, packaged with Skidmark.
- Related: Dino-Hunter Mission Playset (1993).
- Desert Foxes were animated only for commercials.
Desert Fox Classic Marvel Comic Appearances
By my count, Desert Foxes were discernible in 107 panels in 10 issues from Jun. 1988 to Oct. 1990: #72, 73, 88, 99, 100, 101, 102, 103, 104, and 105.
D.E.M.O.N.
- Black two-level tread tank with enclosed three-man cockpit, used by the Iron Grenadiers. Stands for Dual Elevating Multi-Ordnance Neutralizer.
- Boxed vehicle from spring 1988, packaged with the figure Ferret.
- D.E.M.O.N.s were animated only for commercials.
D.E.M.O.N. Classic Marvel Comic Appearances
By my count, D.E.M.O.N.s were discernible in 76 panels in 14 issues from Aug. 1988 to Oct. 1991: #74, 75, 76, 77, SM 18, 87, SM 26, 92, 101, 102, 103, 105, 116, and 117.
By my count, X-19's were discernible in 94 panels in 7 issues from Sept. 1988 to Jan. 1993: #76, 77, 80, SM 28, 115, 119, and 132.
Rolling Thunder
- Green 8-wheeled rocket-launching base with multiple cannon turrets, used by G.I. Joe.
- Boxed vehicle from spring 1988, packaged with the figure Armadillo.
- The Rolling Thunder was animated only for commercials.
Rolling Thunder Classic Marvel Comic Appearances
By my count, the Rolling Thunder was discernible in 55 panels in 7 issues from Feb. 1988 to May 1991: #68, 76, 77, 80, 99, 111, and 112.