if you get a grass, fire or water starter for your partner pick the resistance of that pokemon it also helps if its from the same region.

EG

If you get Totodile from the personality test pick Cyndaquil.
If you get Torchic pick Treecko.

This gives you an extra chance of hitting pokemon in a battle.

If you get Meowth,Pikachu,Eevee,Cubone or Skitty then you cant use this cheat.