>dark grass route 20 encounter
>sewaddle and pidove encounter
>already have 2 normal-types, kill pidove
>Sewaddle breaks out of Pokéball at 20% health
>attacks Lillipup
>try Greatball
>breaks out even faster and kills Lillipup
I inserted the info for Sewaddle in a Gen 5 calculator, and it claims that my catch rate would be 100% in normal grass. Then I change it to dark grass, and the catch rate changes drastically...