I had forgotten about Roar on Latias. Given how much damage entry hazards can do, abusing the heck out of Roar sounds very dangerous indeed (along with winning CM wars etc). Just ensure that you have some way of beating up last Pokemon CM Arceus / Kyogre, though. Re: Max Speed on Latias. I wouldn't put down this option entirely. One thing that's nice is that it outruns HP Fire enemy Lati@s, so you can use something like Latias + Ferrothorn to check them.