Mega Blastoise made its debut as one of the first Mega Pokémon introduced into Pokémon GO. As of now, it is the hardest of the 3 Mega raid bosses and takes on average 4-5 trainers to complete. Mega Blastoise can be duo’d with 2 highly experienced trainers using top tier counters, however, this is not recommended.

This pure Water type will be weak to Grass and Electric type Pokémon. One of the fastest ways to take down Mega Blastoise will be to use Pokémon such as Mega Venasaur, Shadow Electric types (Raikou, Magnezone, Zapdos), along with other strong Grass types such as Sceptile & Tangrowth.

Keep in mind that if you have the opportunity to battle Mega Blastoise in either Clear or Rainy weather, you will be granted with a 20% damage increase which can greatly aid you in battle.


In this guide, we will be diving into the strongest Mega Blastoise counters, tips on how to defeat it and helpful facts about Mega Blastoise.

Disclaimer: Mega Pokémon will only last a maximum of 4 hours when Mega evolved. Consider this when making the decision to Mega evolve your Pokémon. It is recommended to Mega Evolve a Pokémon before you are about to raid as you will provide a damage boost for everyone in that raid and defeat it in a faster time which will earn you more Mega Energy.

Blastoise can be caught with the following CP values:

  • NON-BOOSTED: 1338 -1409 CP
  • BOOSTED: 1673 -1761 CP

With that being said, let’s dive straight into it!

Fact Chart

Blastoise (Mega) Water
Max CP 3941
ATK 264 DEF 237 HP 188
Weak to Strong Against
Grass Electric Ground Rock Fire

Raid Counters

Note: Pokebattler calculates all possible combinations of Pokémon, taking into factor their moveset, Max CP and other variables to determine these top counters.

I will be excluding Shadow Pokémon in this list due to their Stardust requirements and the unrealistic opportunity to own many good IV Shadow counters which the majority of trainers would not have access too. However, if you do have the Shadow variant of these counters maxed out, then feel free to use them as they will have a much higher damage output then their standard form.

Mega Blastoise Raid Counters
Venusaur (Mega) Vine Whip Grass Frenzy Plant Grass
It may come as no surprise that Mega Venusaur will be the strongest competitor for taking down Mega Blastoise. With a max CP of 3698 and an Attack stat of 241 paired with its community day exclusive move, Frenzy Plant, makes Mega Venusaur an extremely solid counter.
Zekrom Charge Beam Electric Wild Charge Electric
Raikou Thunder Shock Electric Wild Charge Electric
Zapdos Thunder Shock Electric Thunderbolt Electric
Roserade Razor Leaf Grass Grass Knot Grass
Mewtwo Psycho Cut Psychic Thunderbolt Electric
Tangrowth Vinew Whip Grass Power Whip Grass
Magnezone Spark Electric Wild Charge Electric
Electivire Thunder Shock Electric Wild Charge Electric
Venusaur Vine Whip Grass Frenzy Plant Grass

Mega Blastoise Moveset Analysis

Fast Moves Charge Moves
  • Water Gun Water
  • Bite Dark
  • Flash Cannon Steel
  • Ice Beam Ice
  • Hydro Pump Water
  • Skull Bash Normal

Make sure to watch out for Ice Beam when using Grass type counters as it will almost certainly take down your Pokémon in one hit. A good indicator to tell what Charge Move Mega Blastoise and any raid boss will have is to pay attention to the ‘recommended’ Pokémon the game provides you with when entering a raid lobby.

If the game gives you only Electric types and no Grass users, then Mega Blastoise will have Ice Beam. Hydro Pump also has the ability to one shot an Electric type user if you do not perform a dodge to avoid the damage output.

Mega Raid Guide: Top Mega Blastoise Counters In Pokémon GO

Parting Words

Keep in mind that the Mega Energy needed to Mega evolve a Pokémon decreases with each evolution. This will only work with each individual Pokémon so be sure to Mega evolve your best IV Pokémon to have a discount for further use in future battles.

Good luck taking down Mega Blastoise in raids trainers!
-Adam ‘Avrip’