You can't claim such and such isn't a check because I can see the future and predict you. You also can't claim that Latios is going to have HP fighting when going up against a team with TTar and HP fire when going up against a team with scizor.It only needs one of the two for different checks. Also, outplaying your opponent isn't hard; if he has a poke on the field which will be KOed by either HP fire or DM (i.e. Breloom), and you know from team preview Nattorei is the only poke able to switch in on a DM, going for the HP is a safe option, since it might cripple your main Latios check, allowing you to spam DM for the rest of the match.
Obviously if your opponent has breloom out and a nattorei as their only counter HP fire is a no brainer and you lose very little by using it. Except that's not going to happen most of the time. What's going to happen is that Latios will have come in on something like Garchomp to revenge/check it and you know they have a Nattorei. Now you're you're thinking am I going to HP fire the predicted Nattorei switch and risk garchomp killing me or will I just play it safe and use draco meteor knowing nattorei might come in.
If you play rain/sun HO with 6 sweepers then you have to accept that you will probably lose something if Latios gets in. But once it has killed something, then you send something else in that's going to kill it or force it out and you play to limit the opportunities it has to get back in. That's what HO is. You hit hard, you predict and make sure what threatens you never has a chance to get in scot free. You can't expect to play HO and still counter stuff.Reuniclus doesn't destroy full stall because Spiritomb And the playstyle i'm talking about is rain/sun OFFENSE. It can't be too hard to understand.
Checking means stopping a pokemon from completely running over your team by either killing it or forcing it out. Yes most of the time it's revenge killing. Sometimes it just means forcing it out and making sure it has limited opportunities to get back in. When you play stall, you put counters to stop Latios cold. When you play HO, you put checks that will outspeed and kill it.So checking means revenging. That's what you're claiming. So Dorry checks 90% of the metagame in sand... I always thought a check needed to be able to switch in too. Apparently HP ice Chillachino checks Garchomp. Interesting.