unanswered BW2's Repel Functionality in BW

[Oxnite]

Hi everyone,

Is it possible to put the Repel functionality from Pokémon Black 2 & White 2 in Pokémon Black & White?

By Repel functionality, I mean the option where after 1 Repel usage you are being asked to use another immediately without selecting it from the Bag.

Well, I guess it would be possible but my question is if somebody could push me in the right direction or indicate difficulty of adding this.

Thanks a lot in advance.

Oxnite