252 SpA Life Orb Technician Roserade Hidden Power Fire vs. 252 HP / 252+ SpD Mega Scizor: 359-426 (104.3 - 123.8%) -- guaranteed OHKO
252 SpA Life Orb Technician Roserade Hidden Power Fire vs. 252 HP / 252+ SpD Ferrothorn: 322-385 (91.4 - 109.3%) -- 87.5% chance to OHKO after Stealth Rock
252 SpA Life Orb Technician Roserade Hidden Power Fire vs. 252 HP / 0 SpD Skarmory: 333-393 (99.7 - 117.6%) -- guaranteed OHKO after Stealth Rock
252 SpA Life Orb Roserade Sludge Bomb vs. 252 HP / 4 SpD Azumarill: 445-525 (110.1 - 129.9%) -- guaranteed OHKO
She has bulk enough to at least counter Ass Vest Azu with Play rough + Aqua Jet, and can come in on Choice Band Azu, take a Play Rough or Waterfall and outspeed
252 SpA Life Orb Roserade Leaf Storm vs. 252 HP / 252+ SpD Rotom-W: 369-437 (121.3 - 143.7%) -- guaranteed OHKO
Note that Roserade is faster than these mons
252 SpA Life Orb Roserade Leaf Storm vs. 4 HP / 0 SpD Landorus: 324-382 (101.2 - 119.3%) -- guaranteed OHKO
---Landorus can't switch in
and she can always threaten switch ins/slower mons with a sleep powder
252 SpA Life Orb Technician Roserade Hidden Power Fire vs. 32 HP / 0 SpD Bisharp: 333-393 (119.3 - 140.8%) -- guaranteed OHKO
252+ Atk Life Orb Bisharp Sucker Punch vs. 4 HP / 0 Def Roserade: 259-305 (98.8 - 116.4%) -- guaranteed OHKO after Stealth Rock
---Bisharp can't switch in, Bisharp Priority Sucker punch puts a damper on Roserade
252 SpA Life Orb Technician Roserade Hidden Power Fire vs. 252 HP / 4 SpD Aegislash-Shield: 177-208 (54.6 - 64.1%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
--Aegislash can't switch in, although Aegi beats her 1 on 1 with Shadow Ball + Shadow sneak
252 SpA Life Orb Technician Roserade Hidden Power Fire vs. 252 HP / 4 SpD Mega Mawile: 260-307 (85.5 - 100.9%) -- 43.8% chance to OHKO after Stealth Rock
252+ Atk Huge Power Mega Mawile Sucker Punch vs. 4 HP / 0 Def Roserade: 234-276 (89.3 - 105.3%) -- 37.5% chance to OHKO
---I think full HP Mega Maw has the upper hand here.
252 SpA Life Orb Roserade Sludge Bomb vs. 4 HP / 0 SpD Thundurus: 224-265 (74.6 - 88.3%) -- 93.8% chance to OHKO after Stealth Rock
252 SpA Life Orb Thundurus Hidden Power Ice vs. 4 HP / 0 SpD Roserade: 161-190 (61.4 - 72.5%) -- guaranteed 2HKO after Stealth Rock
---Thundurus can't really switch in, he wins 1 on 1
252 SpA Life Orb Roserade Sludge Bomb vs. 252 HP / 0 SpD Clefable: 408-484 (103.5 - 122.8%) -- guaranteed OHKO
252 SpA Life Orb Roserade Sludge Bomb vs. 252 HP / 252+ SpD Clefable: 289-343 (73.3 - 87%) -- guaranteed 2HKO after Leftovers recovery
252 SpA Life Orb Roserade Leaf Storm vs. 4 HP / 0 SpD Excadrill: 382-450 (105.5 - 124.3%) -- guaranteed OHKO
--beats non scarf/sand rush variants, exca can't switch in
252 SpA Life Orb Roserade Leaf Storm vs. 4 HP / 0 SpD Garchomp: 308-364 (86 - 101.6%) -- 50% chance to OHKO after Stealth Rock
252 Atk Garchomp Earthquake vs. 4 HP / 0 Def Roserade: 232-274 (88.5 - 104.5%) -- guaranteed OHKO after Stealth Rock
---I guess chomp can't reliably switch in? but he is gonna RK every time with SR up
252 SpA Life Orb Roserade Leaf Storm vs. 252 HP / 252+ SpD Hippowdon: 476-562 (113.3 - 133.8%) -- guaranteed OHKO
252 SpA Life Orb Roserade Sludge Bomb vs. 252 HP / 0 SpD Zapdos: 204-242 (53.1 - 63%) -- guaranteed 2HKO after Stealth Rock and Leftovers recovery
--she is faster than generally used phys Def Zapdos though loses to offensive variants.
252 SpA Life Orb Roserade Leaf Storm vs. 4 HP / 0 SpD Gyarados: 269-317 (81 - 95.4%) -- guaranteed OHKO after Stealth Rock
252 SpA Life Orb Roserade Leaf Storm vs. 4 HP / 0 SpD Mega Gyarados: 429-507 (129.2 - 152.7%) -- guaranteed OHKO
252+ Atk Mold Breaker Mega Gyarados Ice Fang vs. 4 HP / 0 Def Roserade: 252-298 (96.1 - 113.7%) -- guaranteed OHKO after Stealth Rock
--she is faster, so I think she wins 1v1. After a boost tho, no
252 SpA Life Orb Roserade Leaf Storm vs. 252 HP / 4 SpD Landorus-T: 321-380 (84 - 99.4%) -- 75% chance to OHKO after Stealth Rock
--can't switch in, loses to max speed/scarf 1 on 1
252 SpA Life Orb Roserade Sludge Bomb vs. 4 HP / 0 SpD Breloom: 564-665 (215.2 - 253.8%) -- guaranteed OHKO
252+ Atk Life Orb Technician Breloom Mach Punch vs. 4 HP / 0 Def Roserade: 99-117 (37.7 - 44.6%) -- 4.7% chance to 2HKO after Stealth Rock
--sash variants win reliably with a rock tomb + Mach Punch/4Hit bullet seed
questionable, i.e. bad matchups include Zard X/Y, Mamoswine,
latios, Chansey, M-Venusaur, Deoxys-S, Talonflame, plus a lot of other shit.
I basically wanted to try to support reasoning for her being OK as having an enjoyable experience with using Roserade on a team previosly.