-Mention Lati@s as being checked super hard by Ho-Oh outside of rain. And even in it only fearing Thunder and Surf. Grass Knot / Dragon Pulse sets are turded on.
Latios's Dragon Pulse actually 2HKOes after Rocks, Draco Meteor OHKOes and if it gets a Calm Mind boost up it, Dragon Pulse OHKOes. Psyshock deals a hefty chunk too! It hits Ho-oh's weak side meaning it will always OHKO after rocks (just barely though ((51.44% - 60.82%)). Latias is a similar case except it doesn't use Draco Meteor and needs a CM for Psyshock to always OHKO.
Is max speed really nessecary for Physical Attacker? I mean, its bulk is already so good and at tailwind it doesn't need maximum Speed to outspeed everything. With Flame Charge you may face issues but I mean people don't even run max speed modest Kyogre anymore, and you still lol at Scarfed Palkia in sun.
Also hows this spread for a new one: 248 HP / 178 Atk / 84 Spe
Outspeeds uninvested Tentacruel and can BRAVE BIRD it before the next move, additionally, 36 Sp Def EVs can be stolen from Attack and allocated into Special Defense to prevent + 4 Life Orb Dark Pulse from OHKOing (yes you don't need 74 evs lol).
You can also steal from 8 EVs from HP and put it in to attack to make the Ho-oh 2HKO 252 / 240 neutral nature Ogre after Stealth Rocks.
I'm not sure about the gen 4 spread to be honest, really, tank Ho-oh can't even threaten Tyranitar unless it has EQ, and Sub is so huge on Ho-oh...