I never thought you can lose up to almost 40 thropies??
and what’s up with this name? .-.
Probably he got attacked many times and lost a lot of trophies after you attack him and then he revenged you. The trophies you lose or win when you revenge is related to the difference between your trophy number and the enemy’s trophie number, and the tier you’re in.
I have won more than 40 trophies from a revenge so it isn’t quite surprising to me.