A Lurking Menace is the first co-op event match in Super Smash Bros. for Wii U. In it, player 1 controls Mario and player 2 controls Luigi, and must defeat Bowser Jr. If the players wait too long, they're forced to fight a Giant Bowser. Both players have two stock each while both the opponents have one.
This event is available from the start. Completing the event unlocks the down path.
- Down path: Awards 500G. Leads to Pokémon Multi Battle!
Completing the event within 15 seconds awards a Pity Final Smasher Shoes equipment.
- This event is essentially the inverse of Family Ties.