The semi-invulnerable turn is the first turn of some two-turn moves, in which the user is invulnerable to most moves.
Effect
This move effect may be in need of research. Reason:can it prevent residual damage? (see talk) You can discuss this on the talk page.
During the first turn of some moves that take two turns to fully execute, the user will perform an action (such as fly up high or burrow into the ground) that renders them unaffected by the terrain and, under regular conditions, invulnerable to all but a few specific moves. On the following turn, PP will be deducted, the move will deal damage, and it will count as the last move used. The semi-invulnerable turn can be skipped with a Power Herb, except for Sky Drop. A Pokémon in a semi-invulnerable turn can still be hit by an attacking Pokémon that has taken aim using Mind Reader or Lock-On, or if either it or the attacking Pokémon has No Guard. If a Pokémon with Magic Bounce or Dancer is in a semi-invulnerable turn, the Ability will not activate.
There are four volatile status conditions related to the semi-invulnerable turn: Sky-High, Underground, Submerged, and Concealed. Prior to Pokémon Champions, they did not have an official name.
The Sky-High status is gained by a Pokémon that has used Fly, Bounce, or Sky Drop. Pokémon with this status are still vulnerable to Gust, Thunder, Twister, Sky Uppercut, Smack Down, Hurricane, and Thousand Arrows. If successfully used on a Pokémon in the semi-invulnerable turn of Fly or Bounce, the moves Smack Down and Thousand Arrows will cause the target's Sky-High status to be lost and the ongoing move to be canceled. Furthermore, if the moves Gravity or G-Max Gravitas are used, Fly, Bounce, and Sky Drop cannot be used, and Pokémon already with the Sky-High status have the ongoing move canceled.
The Underground status is gained by a Pokémon that has used Dig. Pokémon with this status are still vulnerable to Fissure and will receive double damage from Earthquake and Magnitude.
The Submerged status is gained by a Pokémon that has used Dive. Pokémon with this status will receive double damage from Surf and Whirlpool.
In Generation I only, the invulnerability glitch affects semi-invulnerable Pokémon. If a Pokémon is fully paralyzed or hurts itself in confusion while in the semi-invulnerable stage of Fly or Dig, all moves (with the exception of Swift, Transform and possibly the unleashed damage from Bide) from the opponent will miss or fail until the user switches Pokémon, finishes the battle or successfully performs a charging move (specifically Fly, Dig, Razor Wind, Skull Bash, or Solar Beam). The user can move normally while in this state. This glitch was fixed in Pokémon Stadium.
Generation II onward
Semi-invulnerable Pokémon are now protected against Swift, Transform, and Bide.
Generation IV onward
Poké Balls can no longer be used if the wild Pokémon in the semi-invulnerable turn of a move.
In Generation V only, due to a glitch, when Gravity brings down Pokémon affected by Sky Drop, the Pokémon that was the target of Sky Drop will still not be able to move.
