Pokémon-specific weakness guide
Mega Slowbro Weaknesses and Counters
This guide explains Mega Slowbro's defensive profile, including every weakness, resistance, immunity, and practical counter type based on its Water / Psychic typing.

Mega Slowbro
#0080
Resistances (6)
Immunities (0)
Battle notes
- Mega Slowbro's Water / Psychic typing is best attacked with Electric (2x), Grass (2x), Bug (2x). Start with those attacking types when choosing moves or counter Pokémon.
- Avoid relying on common Fire, Water, Ice attacks unless they have unusually high power or a secondary purpose, because Mega Slowbro resists or ignores those matchups.
- This guide uses the modern Gen 6+ type chart only. Abilities, held items, Terastallization, weather, fields, and special move rules can still change real battle outcomes.
Best counter types
These attacking types hit the defender for super-effective damage under the modern Gen 6+ type chart.
Example Pokémon with Effective Types
These are examples of Pokémon associated with super-effective attacking types, not a ranked competitive counter list.
Defensive typing summary
Mega Slowbro's base defensive typing is Water / Psychic. The weakness chart multiplies both types when a Pokémon has two types, so a matchup can become 4x, 2x, 1x, 0.5x, 0.25x, or 0x.
Related guides
FAQ
What is Mega Slowbro weak to?
Mega Slowbro is weak to Electric (2x), Grass (2x), Bug (2x), Ghost (2x), Dark (2x).
Which attacking types are most practical against Mega Slowbro?
Electric, Grass, Bug, Ghost, and Dark are tied as the strongest attacking types against Mega Slowbro, each dealing 2x damage.
Does Mega Slowbro's ability change these weaknesses?
This page uses base defensive typing only. Abilities, held items, Terastallization, weather, fields, and special move rules can change actual battle outcomes.