- If I use Metagross' "Meteor Mash" attack several turns in succession, does the damage keep piling up as 60, 120, 180, 240, etc.?
- No, Meteor Mash tops out at 120. It only adds +60 to the base 60 damage, it does not accumulate on successive turns.
Source:
Celestial Storm FAQ (2018-07-20), TPCi Rules Team (2018-08-02)