Wow, my list has changed.
1. Godzilla 1985
2. Godzilla vs. Biollante
3. Godzilla, Mothra, King Ghidorah
4. Mothra
5. War of the Gargantuas
6. Destroy all Monsters
7. Godzilla vs. Mothra
8. Godzilla vs. Mechagodzilla 74
9. Godzilla vs. Mechagodzilla II
10. Godzilla King of the Monsters