>>14077250Water has more duo-typing options than any other type, paired up with everything but Fire. Almost 1/5th of all Pokemon are Water type.
Water benefits the most from its weather condition
Water is only resisted by Dragon, Grass, and itself. Nearly every water type is capable of learning an Ice-type move for coverage, invalidating its Dragon and Grass weaknesses.
Water is only weak to Electric and Grass. Grass is generally unviable offensively and is countered by every Water type knowing Ice type moves. Electric type is often countered by secondary typings with Ground and the wide distribution of Ground-type moves.
Water is super-effective against two of the most common attacking types, Ground and Fire, and is one of the few types to hit Steel for neutral damage.
>>14077634Fire is never bad offensively, Bug/Flying is certainly worse.
I would argue Grass/Bug is the worst overall combination.
