Double-Edge does damage, and the user receives recoil damage equal to 25% of the damage done to the opponent.
If the user of Double-Edge attacks first and faints itself due to recoil damage, the opponent will not attack or be subjected to recurrent damage during that round. However, the user will still be subject to recurrent damage.
Self-inflicted recoil damage from Double-Edge from the previous turn can be countered if the opponent does not make a move on the following turn. If Double-Edge breaks a substitute, the user will take no recoil damage.
In Stadium, no recoil damage is taken if Double-Edge knocks out an opponent.
Double-Edge has a power of 100 in this generation.
Koffing and Weezing are the only Generation I Pokémon that can learn TMs that cannot learn Double-Edge by TM or move tutor.
Since the introduction of abilities in Generation III, Double-Edge became a good strategy with the trait Rock Head, which prevents recoil damage, since most Pokémon with that ability can learn Double-Edge.
