I got a perfect IV Marill while breeding today, and I can't decide the EV spread between 164 HP/252 Atk/92 Spe or
240 HP/252 Atk/16 SpD or 92 HP/252 Atk/164 Spe. I also have a Scolipede with speed boost, I am thinking of changing the nature to jolly or timid, redo the EVs to make it bulkier and replace steamroller with substitute to make it a pure support so that I could baton pass with a +2 speed to my slower Pokemons such as Azumarill for sweep. I don't know if the gym leaders in Reborn have perfect IVs and proper EVs on their Pokemon, is the 92 or 164 speed EV investment for Azumarill necessary in Reborn?