Quoted By:
I know what you're thinking: "Wood is just Grass!" But that's like saying "Rock is just Ground!" or "Ice is just Water!" Conceptually, Wood and Grass would be related types in much the same vein as Rock and Ground or Water and Ice. But like those types, Wood's interactions with other types could be radically different from its counterpart Grass. After all, Grass generally conveys soft and moist leaves, vines, petals, and fruit, while wood is hard, firm, and dry. If you had a Pokemon based on a wooden object or structure, could it really be called Grass-type?
Here are the type interactions I have in mind for Wood:
Super effective against: Ground, Electric
Resisted by: Rock, Steel, Wood
Resistant to: Ground, Wood, Electric
Weak to: Fighting, Bug, Steel, Fire
As for existing Pokemon and moves that could become Wood-type:
Pokemon: Phantump and Trevenant (Ghost/Wood), Grookey, Thwackey, and Rillaboom (Grass/Wood), Hisuian Voltorb and Electrode (Electric/Wood)
Moves: Wood Hammer, Branch Poke
