Fuh.. rock event till now already 470km.

Type effectiveness chart

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Highest DPS of each type

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My current favorite gym attacker is Tyranitar.

Reason being, a typical gym in my area normally consist a combination of :

Blissey
Snorlax
Dragonite
Tyranitar
Exeggutor
Lapras
Gyarados
Vaporeon
Rhydon.

In most fights, most damage to the attacker will be dealt by Blissey and Snorlax due to the longer time it takes to battle them.

Tyranitar resist Blissey's common zen headbutt and all of snorlax fast moves so have to just watch and dodge the charge moves.

As for Lapras and Vaporeons, water gun has been nerfed so just have to watch out for Hydropump.

So 90% of the time, a 3.5K Tyranitar with Bite/Stone edge will tank through first round of 6 full motivation defenders with half health remaining and provided nobody is feeding berries, its enough to take down the remaining 2 rounds as well provided the defenders are not full powered monsters.

Why not go raid Ttar instead of evolving??