From Bulbapedia, the community-driven Pokémon encyclopedia.
Mega Drain (Japanese: メガドレイン Mega Drain) is a damage-dealing Grass-type move introduced in Generation I. It was TM21 in Generation I.
Mega Drain is the second in a line of three Grass-type HP draining attacks, the other two being Absorb and Giga Drain.
Mega Drain inflicts damage, and 50% of the damage dealt to the target is restored to the user. The amount of HP recovered is rounded down unless Mega Drain deals only 1 HP of damage. In this case, 1 HP would be restored to the user.
If Mega Drain breaks a substitute, no HP will be restored to the user. If HP is restored to the user when its current HP is greater than its maximum HP, its current HP will be set equal to its maximum HP.
In Pokémon Stadium, Mega Drain will always miss if the opponent has a substitute.
Mega Drain has 10 PP.
Mega Drain functions the same as in Generation II, however, when used on a Pokémon with the Liquid Ooze Ability, the user will lose the amount of HP it would have gained instead.
Generation IV and V
Mega Drain's base PP was increased to 15. If the user has a Big Root as its held item, it will recover 30% more HP than it normally would. Big Root does not increase damage dealt. All other effects are the same.
|| A Grass-type attack. It adds half the HP it drained from the target to the attacker's HP.
|| Steals 1/2 of the damage inflicted.
|| An attack that absorbs half the damage inflicted.
|| A tough attack that drains half the damage it inflicted to restore HP.
| A nutrient-draining attack. The user's HP is restored by half the damage taken by the target.
In other games
Mega Drain is the only move of Petilil.
In the anime
|| Budew being healed
| The opponent is hit with a blast of energy that absorbs its HP and gives it to the user.
|| First Used In
|| Golbat's eyes glow yellow and it bites the opponent.
| Mandi's Golbat
|| Round One - Begin!
|| The bud on Budew's head glows white, and it shoots a dark green beam from its bud at the opponent. The green beam grabs the opponent, traps it inside and sucks its energy. As it does, the opponent becomes outlined in red and the beam turns red. The beam releases the opponent and goes back to Budew. Budew glows white when the beam goes back to it, and all of its injuries disappear.
| Nando's Budew
|| Dawn of a New Era!
|| Roserade sticks out its arms and releases a green beam from the flowers on its hands.
| Drew's Roserade
|| A Full Course Tag Battle!
In the manga
In the Pokémon Adventures manga
In other generations
In other languages