136 of the 153 type pairings have at least one species
Flying and Normal is the most common, with 27 species. Weaknesses and immunities are for Generations VI to IX.
526 dual-type species among the 1025 this site covers.
Pairings with species
136 pairings, most species first
Unused
17 pairings have no species here
Bug and Dragon, Bug and Normal, Dragon and Fairy, Electric and Fire, Electric and Grass, Electric and Psychic, Fairy and Fire, Fairy and Ground, Fairy and Ice, Fire and Ice, Ghost and Normal, Ghost and Rock, Ice and Normal, Ice and Poison, Ice and Steel, Normal and Rock and Normal and Steel.