Rillaboom in Pokémon GO
By Matt · Updated Quick answer
Rillaboom is Grass type, so it's weak to Bug, Fire, Flying, Ice and Poison.
What is Rillaboom weak to?
Rillaboom is Grass type, so it takes extra damage from Bug, Fire, Flying, Ice and Poison attacks.
Defending Rillaboom 
Grass
Grass Hits it hard
-
Bug160% damage 1.6× -
Fire160% damage 1.6× -
Flying160% damage 1.6× -
Ice160% damage 1.6× -
Poison160% damage 1.6×
Bounces off
-
Electric62.5% damage - Grass62.5% damage
-
Ground62.5% damage -
Water62.5% damage
Leave Electric, Grass, Ground and Water attackers at home: Rillaboom resists them.
Matt's guides and news about Rillaboom
Event guide Dynamax Trails Pokémon GO Event Guide: Eternatus, Eternamax and Every Hundo CP Event guide Grookey Community Day 2026 Recap: Hundo CP, Shiny Grookey and Frenzy Plant Event guide Max Finale 2025 Recap: Eternamax Eternatus, Gigantamax Returns and the Dark Skies GO Pass
FAQ
What is Rillaboom weak to in Pokémon GO?
Rillaboom is Grass type. It's weak to Bug, Fire, Flying, Ice and Poison. It resists Electric, Grass, Ground 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.