Simple

The stat changes the Pokémon receives are doubled.

Pokémon


As an ordinary Ability

  Pokémon Type Abilities Hidden Ability HP Atk Def SpA SpD Spe
Numel 60 60 40 65 45 35
Bidoof 59 45 40 35 40 31
Bibarel 79 85 60 55 60 71

As a Hidden Ability

  Pokémon Type Abilities Hidden Ability HP Atk Def SpA SpD Spe
Woobat 65 45 43 55 43 72
Swoobat 67 57 55 77 55 114