>>44092830Certain dual types are bad, because they offer more disadvantages than advantages (such as the infamous Grass/Bug). Other dual types, however, complement each other offensively and defensively. Grass/Steel, Water/Ground, Bug/Steel, Steel/Fairy and several other Steel-type combinations prove to be some of the best defensive types in the game. Ghost/Fighting can hit through every Pokemon in the game at least neutrally for now, and a Normal/Fighting with Scrappy can do the same. You also have to bear in mind that dual-typed Pokemon get resistances and immunities that a Pokemon of a single type does not. For instance, Dark-types are immune to Psychic but ordinarily take normal damage to Dragon, and they have weaknesses to Fighting and Bug. Add the Fairy-type to that (like Grimmsnarl and his kin), and you get an additional immunity to Dragon, and the Fighting and Bug weaknesses that pure Dark-types have become neutralities (since Fairy resists Fighting and Bug). Look at the Water/Flying Pelipper, and tell me that a Drizzle user that has a Ground immunity, a Bug and a Fighting resistance, and a neutrality to Grass is worse off than a pure Water-type Drizzle user like Politoed despite having a double weakness to Electric.
Dual-types help or harm a Pokemon based on the type match-up, as well as the presences of other Pokemon that have types strong against or weak against the dual-type. Grass/Bug is bad because several types resist them both, and you have shit like Heatran, Scizor, and Ferrothorn especially that are especially common in upper tier play. Meanwhile, look at Steel/Fairy, and how many Dragon-, Fighting-, and other Steel-types are especially common in upper tier play. Magearna is powerful because it has an amazing defensive typing that can also hit like a truck.
