Simple: The stat changes the Pokémon receives are doubled.

PokémonTypesAbilitiesHPAtkDefSpASpDSpeBST
Numel FireGround 60 60 40 65 45 35 305
Bidoof Normal 59 45 40 35 40 31 250
Bibarel NormalWater 79 85 60 55 60 71 410
Woobat PsychicFlying 65 45 43 55 43 72 323
Swoobat PsychicFlying 67 57 55 77 55 114 425