How to beat Mega Blastoise raids in Pokemon GO? Best counters, shiny odds, 100% CP, and more

From July 14, 2025, to July 22, 2025, Pokemon GO's Mega Raids will shift to a familiar raid boss. This time, Mega Blastoise will assume the role and battle players for supremacy.

If trainers can defeat Mega Blastoise in this raid, they'll receive Blastoise Mega Energy as well as an opportunity to catch Blastoise. Considering the popularity of this Kanto region starter Pokemon and its counterparts, plenty of players will likely flock to gyms to take on this Mega Raid. Plus, Mega Blastoise is a huge help in battle, particularly when fighting in high-level raids.

However, before GO trainers get ahead of themselves, they'll first need to defeat Mega Blastoise.

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Best counters to Pokemon GO Mega Blastoise raids

The best counters to use against Mega Blastoise are:

• Shadow Regigigas (With Hidden Power - Grass)
• Shadow Raikou
• Kartana
• Mega Manectric
• Xurkitree
• Mega Sceptile

Mega Blastoise as seen in the anime (Image via The Pokemon Company)

Below are some more good counters categorised based on their types:

Best Grass-type counters to Mega Blastoise:

Pokemon	Fast Move	Charged Move
Mega / Shadow Sceptile	Fury Cutter	Frenzy Plant
Mega / Shadow Venusaur	Vine Whip	Frenzy Plant
Kartana	Razor Leaf	Leaf Blade
Sky Forme Shaymin	Magical Leaf	Grass Knot
Zarude	Vine Whip	Power Whip
Shadow Tangrowth	Vine Whip	Power Whip
Shadow Torterra	Razor Leaf	Frenzy Plant

Best Electric-type counters to Mega Blastoise:

Pokemon	Fast Move	Charged Move
Shadow Raikou	Thunder Shock	Wild Charge
Mega Manectric	Thunder Fang	Wild Charge
Xurkitree	Thunder Shock	Discharge
Shadow Electivire	Thunder Shock	Wild Charge
Shadow Zapdos	Thunder Shock	Thunderbolt
Zekrom	Charge Beam	Fusion Bolt

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What are Mega Blastoise's weaknesses in Pokemon GO?

As a Water-type, Mega Blastoise is weak to Electric- and Grass-type moves, which trainers will want to prioritize using.

Furthermore, if these moves are used by Electric and Grass-type Pokemon, respectively, they'll receive the Same Type Attack Bonus (STAB) by matching attack types to the user.

Players are highly advised to pursue this bonus, as they will want to deal as much damage as possible to take Mega Blastoise down as quickly as possible.

Mega Blastoise resists the following types, so avoid using them:

• Fire
• Ice
• Steel
• Water

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Can you solo defeat Pokemon GO Mega Blastoise raids?

Yes, you can defeat Pokemon GO Mega Blastoise when facing it solo. But it still being a difficult boss you should approch it with a well planned team covering all its weaknessess.

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Shiny odds from Mega Blastoise raids in Pokemon GO

Mega Blastoise and its shiny variant (Image via The Pokemon Company)

There is a 1-in-128 chance of encountering a shiny version of Blastoise once you defeat it in a raid battle. This doesn't guarantee a shiny encounter after doing 128 raids.

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Pokemon GO Blastoise 100% CP from raids (hundo CP)

Blastoise will be in the following CP ranges once caught:

• No weather boost: 2,162 CP - 2,252 CP at level 20 (10/10/10 - 15/15/15 IVs)
• Weather boosted (Rainy): 2,703 CP - 2,815 CP at level 25 (10/10/10 - 15/15/15 IVs)

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Pokemon GO Mega Blastoise stats and moves as a raid boss

• Combat Power: 42,017
• Attack: 264
• Defense: 237
• Stamina: 9,000 HP
• Fast Attacks: Bite, Water Gun, and Rollout
• Charged Attacks: Flash Cannon, Ice Beam, Hydro Cannon, Hydro Pump, and Skull Bash

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Check out our other GO guides:

• Ditto disguises
• Buddy Evolution Adventure Together guide
• Best Fast Attacks in the game
• Sierra counters
• Cliff counters
• Arlo counters
• Giovanni counters
• Team GO Rocket Grunts
• Go Evolution Calculator
• Pokemon Type Calculator