Pokemon Dual Type Chart. For instance a bug type attack is a good example. The last Pokemon that you selected was.
Immunities do not exist in GO but are treated as a double-resistance. There are some duplicated rows flyingpoison and poisonflying for example and there are also dual types listed that dont actually exist in any known pokémon in the game. Instead of doublinghalving an attacks power it is multiplieddivided by 16.
A Pokemon hit with a damage type that both its typings are weak against will suffer quadruple damage x4.
The majority of the type chart has remained the same over the years but there have been a few changes. 342 rows Pokémon dual-type charts. This is currently a work in progress. Having an understanding of which Pokemon you can use.