If I have a Tera Pokemon on my Bench when I use Landorus' "Earthquake" attack, do they take 10 damage or not?
No, the Tera Trait protects them from damage by your own attacks as well.
Earthquake




x2Frenzy
As long as your opponent has Kyogre, Kyogre ex, Rayquaza, or Rayquaza ex in play, Groudon ex's attacks do 40 more damage to the Defending Pokémon (before applying Weakness and Resistance).

Mix-UpFlip a coin. If heads, your opponent discards the top card from his or her deck.


EarthquakeDoes 10 damage to each of your Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)
When Pokémon-ex has been Knocked Out, your opponent takes 2 Prize cards.
If I have a Tera Pokemon on my Bench when I use Landorus' "Earthquake" attack, do they take 10 damage or not?
No, the Tera Trait protects them from damage by your own attacks as well.