Choiced ghost attacks are rare
Linoone won't work in Ubers? Wanna know why? Here are some damage calcs
+6 ES Silk Scarf Adamant ES vs 404 HP / 397 Def Groudon:
(271, 276, 279, 282, 285, 288, 291, 294, 298, 301, 304, 307, 310, 313, 316, 321)
79% maximum
+6 ES Silk Scarf Adamant ES vs 341 HP / 276 Def Dialga (Scarf Dialga):
(195, 198, 200, 203, 205, 207, 210, 212, 214, 216, 219, 221, 223, 225, 228, 231)
67.5% maximum
+6 Shadow Claw vs 503 HP / 372 Def Giratina
(282, 286, 290, 292, 296, 300, 302, 306, 310, 312, 316, 320, 322, 326, 330, 334)
66% maximum
+6 Adamant Silk Scarf Return vs 354 HP / 316 Def Forretress
(216, 219, 222, 225, 227, 229, 232, 234, 237, 240, 242, 245, 247, 250, 252, 255)
72% maximum
That's just a glimpse into the calcs. Without Silk Scarf Linoone fails to OHKO Defensive Kyogre and Wobbuffet too, as well as failing to OHKO Lugia after SR damage.
Also, let's not forget these threats
- Bullet Punch Scizor (it will survive ES)
- Jolly ES Rayquaza (if you decide to go for Silk Scarf)
- ES Deoxys-A
- Bullet Punch Metagross. Also Earthquake can mess up Dig.
- Scarf Palkia (for non Extremespeed versions)
Linoone also has troubles coming in. Lucario and Rayquaza could use their resistances to switch in without resorting to Wobbuffet