@caveman I never had any problems with that. I did a lot of competitive battling, and it's pretty boring until gen 3 at least. Gen 1 competitive battling is basically solved. Newer gens are more about strategy and less about memorization.
@Mysticial Mew is irrelevant in ubers nowadays anyways. It got demoted to UU after people realized it's just a glorified Smeargle with a smaller movepool.
@Mysticial Well, yeah. Darkrai, Giratina, Genesect, and some Arceus all have STAB super effective attacks. 100/100/100 defenses aren't enough to withstand attacks from Deoxys, Rayquaza, or really any of the other big attackers other than Mewtwo. Arceus also has almost the same movepool, and better stats universally. The only 100/100/100/100/100/100 pokemon in Ubers is Manaphy, and that's because hydrorest is too broken in OU with those defenses.
It won't survive a Choice Scarf Kyogre's Water Spout, which is the most significant move in the tier. If you can't survive that, you need a really good reason to be considered even playable in ubers.
@Mysticial lol EVs don't mean a thing. STAB base power 150 water spout in the rain off of Kyogre's ludicrous SpA is going to kill pretty much anything that doesn't resist it, especially with the obligatory SR support. To get a sense of how ridiculously powerful Kyogre is, Eviolite Chansey can be 2HKOed by a choice specs water spout. Nobody uses specs though because scarf already kills everything Kyogre wants to kill.
I would just attack the Articuno. Sure, it might get a KO, but it shouldn't get 2 if your team is built well. Unless his team was already out of things to deal with it, in which case any generic sweeper would probably work just as well.
@Mysticial That's just poor team building. I always set up stealth rock which would take off 50% of Articuno's health right away, and I have a couple of rock attacks on my team. Plus Articuno isn't even fast for OU. 2/3 of my current team would outspeed it.
If you want a battle tower pokemon, hack an Aerodactyl with Head Smash, Brave Bird, Flare Blitz, and Wood Hammer and stick a Choice Band on it. That will beat entire teams with no difficulty.
So basically in my Battle tower experience. My first two sweepers take care of anything. Maybe once in 5 or so battles do I actually need to rip out the Articuno do get rid of walls and DT garbage, and Wobbuffet...
@Mysticial You can give it Choice scarf if you need speed. It doesn't really need it so much. It can take a hit or two and not much is going to survive its Choice Specs attacks. It's like if Dugtrio affected 35% of the OU metagame.
I just did a damage calc for Scarf Kyogre Water Spout vs Maximally specially defensive Mew. If I give Mew a +SpD nature it deals 80.19-94.55%. After Stealth Rock, that's a 50% chance to OHKO. Without SR, it's guaranteed 2HKO even with leftovers. If Mew doesn't have +SpD nature, it's 87.87-103.46%, which is a guaranteed OHKO after SR, 25% without it.
And no one is ever going to run a Mew with max HP and SpD and +SpD nature. So for all practical purposes, Mew is not going to survive against Scarf Kyogre.