The damage inflicted by the effect of “Elemental Hero Flame Wingman” is based on the ATK of the destroyed monster in the Graveyard. So it’s the original ATK of the monster.
The effect of “Elemental Hero Flame Wingman” is activated when the monster destroyed in battle by it is sent to the Graveyard. You can chain to this effect.
If your “Elemental Hero Flame Wingman” destroys your monster that your opponent controlled, the effect is still activated and you inflict the effect damage to your opponent’s Life Points.
If your “Elemental Hero Flame Wingman” destroys a “Fusilier Dragon, the Dual-Mode Beast” that was Summoned without Tribute, inflict 2800 damage to your opponent’s Life Points.