During a Battlecrasher event, a Troop will randomly join the battle by replacing one of the enemy's Troops. Defeat them and win the battle to earn bonus rewards!
Battlecrashers love to fight and will appear in your battles uninvited and unannounced just like Gnomes do! They will only appear during the time a Battlecrasher event is running. They carry a loot sack which contains extra rewards.
NOTE: Battlecrashers will not appear in Guild Wars battles or in battles where a Valraven or a Gnome has already appeared.
Check if a Battlecrasher event is running
You can see when a Battlecrasher event is running in the Event menu, opened from the right-hand side of the World Map.