Articuno

Type Tier
Ice / Flying BL
Statistics
Stat
HP
90
383
Atk
85
268
Def
100
298
SpA
95
288
SpD
125
348
Spe
85
268
Name Item

Rest + Sleep Talk Articuno

Leftovers
Moveset
~ Rest
~ Sleep Talk
~ Ice Beam
~ Toxic / Hidden Power Electric

Rest and Sleep Talk keep Articuno alive. It has a horrible movepool, anyway, so it won't really notice having those two slots filled.

Name Item

Pseudo-passing Articuno

Leftovers
Moveset
~ Ice Beam
~ Toxic / Hidden Power Electric / Roar
~ Reflect
~ Rest

Reflect gives Articuno a slight chance against Rock Sliders and lets your whole team take physical attacks a bit better. Note that in most formats, Hidden Power legendaries are banned, meaning Articuno would have to use Toxic or Roar that slot.

Other Options

Given its Special Defense, a Curser wouldn't be bad, except for those nasty physical weaknesses. It's best to just pseudo-pass and take advantage of that STAB Ice Beam.

Opinion

Lack of good attacking moves, and a poor typing really hurts Articuno. Its typing ruins it from doing the only thing it's "made" to do, and that's tank / sponge. Its sparse movepool prevents Articuno from attempting to find another role for itself, not that it could anyways.

Counters

Anything carrying Rock Slide will scare Articuno. Blissey and Snorlax can take its hits all day. Blissey can have some trouble actually damaging Articuno enough, though, thanks to Rest. Water and Ice Pokémon stop Articuno easily, but again, have difficulties damaging it enough to not be stalled, themselves. Any Fire-type can stop Articuno easily, especially Charizard.