- ↓ 6.10
- ꩜ 11.72
- ↑ 229.09
{G}{C} → Mass Explosion : 20×
Does 20 damage times the total number of Koffings, Weezings, and Dark Weezings in play (Apply Weakness and Resistance.). Then, this attack does 20 damage to each Koffing, Weezing, and Dark Weezing (even your own). Don’t apply Weakness and Resistance.
{G}{G}{G} → Stun Gas : 20
Flip a coin. If heads, the Defending Pokémon is now Poisoned; if tails, the Defending Pokémon is now Paralyzed.
illus. Shin-ichi Yoshida · LV.24
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Researchers have observed these Pokémon reproducing in industrial waste sites.


Mantidactyle
Played a fun deck with it.
80 damage turn 2 was cool
EricDLee
“Researchers have observed these Pokemon reproducing in industrial waste sites.”
“Observe these Pokemon reproducing.” Is that really kid-friendly?
Mantidactyle
I don’t even imagine how the reproduce.
EricDLee
It’s the Poison Gas Pokemon. Maybe they eat toxic pinto beans and burp out baby Koffing.
Blob Takeshi
Stun Gas: You can’t lose!
HueGram
Correct me if I’m wrong…
If I use Mass Explosion with a (M)(G), I won’t do any damage to my Active Dark Weezing and will only do 10 damage to my benched Weezing’s/Koffing’s? If those benched Pokemon have a (M) energy on them, then they will take zero damage?
Michael
If you have a Metal Energy attached to Dark Weezing, then yes Mass Explosion would only do 10 damage to your Benched Koffings and Weezings. And yes, if THOSE Benched Pokémon had Metal Energy attached, they would take 0 damage—10 reduced on either end.
The question of whether you damage your Active Dark Weezing is interesting but a separate question. A strict RAW interpretation would mean that, since the Active Dark Weezing gives the attack damage a minimum of 20 (it doesn’t, for example, say “20 damage times the total number of additional Koffings, Weezings and Dark Weezings…” etc.), it is therefore one of the Koffings, Weezings and Dark Weezings that takes damage.
On the other hand, the fact that the text doesn’t say something like “including this card” or “Dark Weezing also does 20 damage to itself” implies that Dark Weezing is probably meant to be except from damage to Pokémon that otherwise have its name.
¯_(ツ)_/¯
Charmaster
It wouldn’t take any damage because Metal Energy would reduce the damage it took from Mass Explosion TWICE. https://jklaczpokemon.com/rocket-lc-decks/#dark-weezing You see, the old Metal Energy N1 reduced damage done to the Pokémon it was attached to (More on that later) by 10, but it also DECREASED the amount of damage that Pokémon did (Even to itself) by 10 if it wasn’t Metal type. Dark Weezing would normally do 20 damage to itself, but with a single Metal Energy it does 0 to itself.
Also, Mass Explosion was mistranslated to not apply weakness and resistance even to the defending Pokémon. https://jklaczpokemon.com/wotc-erratas/#dark-weezing Metal Energy was also mistranslated to reduce damage in general rather than damage from attacks, which was relevant because of Pokémon like Dark Golbat RO, Dark Crobat N4 and Elekid N1 that could do damage with Pokémon Powers. https://jklaczpokemon.com/wotc-erratas/#metal-energy