[quote]Start of turn 8
Dugtrio is confused!
Dugtrio burrowed its way under the ground!

The foe's Venomoth used Supersonic!
The attack of the foe's Venomoth missed!

Start of turn 9
Dugtrio is confused!
It hurt itself in its confusion!
Dugtrio lost 39 HP! (14% of its health)

The foe's Venomoth used Supersonic!
The attack of the foe's Venomoth missed!

Start of turn 10
Dugtrio is confused!
Dugtrio used Cut!
The foe's Venomoth lost 13% of its health!

The foe's Venomoth used Confusion!
Dugtrio lost 44 HP! (16% of its health)[/quote]

In turn 10, Venomoth Confusion should've been unable to hit Dugtrio. Due to a bug in Pokemon Red/Blue/Yellow, if a Pokemon is fully paralyzed or hurts itself due to confusion while it's charging for Dig or Fly, the Pokemon becomes invulnerable to normal attacks until it switches out or one of the following moves is used: Fly, Dig, Razor Wind, Solarbeam, Skull Bash or Sky Attack.
Invulnerable to normal attacks means that only Swift and "unleashed energy" Bide effect would be able to hit Dugtrio.