Blastoise in Pokémon GO
By Matt · Updated Quick answer
Blastoise is Water type, so it's weak to Electric and Grass.
What is Blastoise weak to?
Blastoise is Water type, so it takes extra damage from Electric and Grass attacks.
Defending Blastoise 
Water
Water Hits it hard
-
Electric160% damage 1.6× -
Grass160% damage 1.6×
Bounces off
-
Fire62.5% damage -
Ice62.5% damage -
Steel62.5% damage - Water62.5% damage
Leave Fire, Ice, Steel and Water attackers at home: Blastoise resists them.
Matt's guides and news about Blastoise
Event guide Go Bigger 2026: Gigantamax Charizard, Gengar, Venusaur and Blastoise Return Monthly guide Pokémon GO September 2025 Raids: Palkia, Dialga and the Month of Megas Event guide Max Finale 2025 Recap: Eternamax Eternatus, Gigantamax Returns and the Dark Skies GO Pass Monthly guide Pokémon GO July 2025 Raids: Solgaleo, Terrakion, Lunala and the Kanto Megas
FAQ
What is Blastoise weak to in Pokémon GO?
Blastoise is Water type. It's weak to Electric and Grass. It resists Fire, Ice, Steel and Water.
Hundo CPs come from Matt's guides and are checked against PokemonGO Hub. See every live hundo on Hundos right now, or browse all Pokémon.
Get Matt's full take
What to raid each week, with Matt's commentary, is on Patreon. Supporting the content gets you a spot on Matt's friends list.