Xatu
Mystic Pokémon
XATU stands rooted and still in one spot all day long. People believe that this POKéMON does so out of fear of the terrible things it has foreseen in the future.
Base Stats
Type Effectiveness
Abilities
Evolution Chain
Moves
Locations
Details
Sprites
Competitive
Strategy Overview
Xatu's main problem is that its typing gives it a weakness to Thunderbolt, Ice Beam, and Rock Slide, and it doesn't resist Normal. It does have that great 4x Fighting resist and Earthquake immunity, but since most Pokemon with either of these moves will also have at least one of Rock Slide, Shadow Ball, Return, or Hidden Power Ghost, Xatu can't even abuse its resistances to switch in, unless the enemy has a Choice Band.
Grumpig or Hypno are usually a better choice if you want a supporter, Gligar takes on Pokemon that carry Fighting moves better, and Hypno is infinitely better at support. Xatu is simply outclassed by so many Pokemon, it's rarely worth the effort. At least it can come in on Choice Band Earthquakes.
Most Used Moves
Common Teammates
Competitive data from Smogon University via data.pkmn.cc