Pokémon Red Version, Blue Version, and Yellow Version - Two-turn attacks
In a two-turn attack, the user prepares for the attack on the first of its attack segments, and hits the opposing Pokémon on the next of its attack segments. The user can’t take any action during the two-turn attack’s effect. The two-turn attack ends on the next possible attack segment in which the user doesn’t flinch and isn’t asleep, frozen, or under the effect of a multi-turn attack. If none of those events happen on that attack segment, and the attack isn’t otherwise prevented from being used, the last move chosen for use is used on that attack segment and is considered the "last move used" by the user, and PP is deducted from the two-turn attack’s move.
No PP is deducted from a two-turn attack on the first attack segment of its use.
A two-turn attack is not a multi-turn attack, and vice versa.
For all two-turn attacks, on the first attack segment of the attack’s use, no accuracy check is done and no check is made to determine whether the attack will be ineffective against the opposing Pokémon or otherwise be avoided by the opposing Pokémon.
In Pokémon Stadium (known as Pokémon Stadium 2 in Japan), Bide will miss when used when the user is using Dig or Fly.
In Pokémon Stadium (known as Pokémon Stadium 2 in Japan), a two-turn attack is considered the "last move used" by the user on the attack segment that the effect began.