Shadow Articuno! : r/TheSilphRoad

Shadow Articuno Can Be Duo'd Using 24 Unique Rock Type Pokemon! : r/ TheSilphRoad

Articuno Raid Guide Infographic by Team gtr-Storm : r/TheSilphRoad

is this 4* shadow articuno rare or very rare? : r/pokemongo

Articuno, Zapdos, & Moltres Raid Guide Infographic by Team gtr-Storm (Individual guides linked in comments) : r/TheSilphRoad

Shadow boost is now live for Shadow pokemon 👿 : r/TheSilphRoad

How good is Shadow Mewtwo in raids? A PvE analysis on Shadow Mewtwo and future shadow legendaries (Part 1) : r/TheSilphRoad

Confirmation: Shadow moltres is now officially available from Giovanni on May the 1st : r/TheSilphRoad

Shundo Shadow Articuno : r/pokemongo

Shadow Articuno raid guide. Top general counters via pokebattler.com : r/ TheSilphRoad