This includes Gen 6.
Pleaselog inorregisterto add a comment.
For inverse battles, the 4 moves that provide widest coverage are:
Bug- 7 types super effective, 3 not very effective-Fire, Fighting, Poison, Flying, Ghost, Steel, Fairyx2-Psychic, Dark, Grassx0.5
Grass- 7 types super effective, 3 not very effective-Fire, Grass, Poison, Flying, Bug, Dragon, Steelx2-Water, Ground, Rockx0.5
Fighting- 6 types super effective, 5 not very effective-Poison, Flying, Psychic, Bug, Ghost, Fairyx2-Normal, Ice, Rock, Dark, Steelx0.5
Poison- 5 types super effective, 2 not very effective-Poison, Ground, Rock, Ghost, Steelx2-Grass, Fairyx0.5
Worked it out with theSerebii inverse type chart.