If Maractus has no damage on it but I played Fennel this turn, does its "Lively Needles" attack do 100 more damage or not?
If you did not remove any damage counters the Pokemon is not "healed" by Fennel, so Lively Needles would only do the base 20 damage.
Source: Black Bolt/White Flare FAQ; TPCi Rules Team (2025-07-17)