This is a question that I also posted in the look what I bred thread, but it is also much more in depth than just look what I bred so I feel it deserves to go here aswell. Now this is for the Showdown tournament(Double Battle, Lv.50).
My Brave(No guard) Machamp's IV's: 31/31/24/30/31/26
-It has a speed stat of 65
The important Pokemon I don't outspeed in TR with the Machamp that I would beat if I had a 0 speed IV(Or tie with in the case of the base 55's):
-nature, 0 Spe IV: Cacturne(Base 55)
-nature, 0 Spe IV: Exeggutor(Base 55)
-nature, 0 Spe IV: Machamp(Base 55)
-nature, 0 Spe IV: Relicanth(Base 55)
-nature, 0 Spe IV: Rampardos
-nature, 0 Spe IV: Magnezone
-nature, 0 Spe IV: Porygon2
-nature, 0 Spe IV: Swampert
Some of those could be the difference between winning and losing. All of those have the potential to be in one of my matches. Maybe the Rampardos severely damages/kills my Machamp where I could otherwise KO it with Dynamic Punch. So, should I use it or keep breeding?
Edit: In Emerald, if I breed a Male Breloom/Shroomish that knows Spore with a Female Breloom/Shroomish that knows Spore, would I get a baby Shroomish with Spore?