Amumu vs Wukong Jungle Matchup
Amumu Jungle wins 52.5% of 2,274 Low Elo games against Wukong Jungle, +1.8 points vs expected, 2-patch window 26.19-26.20.
Researched on LoL patch 26.20. Tips are written to hold at any rank; stats come from Low Elo ranked games up to patch 26.20.
Why Amumu is favored
Amumu's magic damage bypasses the armor Wukong relies on, and his Q/R stuns punish Wukong when he dives into a grouped fight. Amumu's teamfight strength is especially useful when Wukong commits before his team can follow.
How to play as Amumu
Keep R available for the grouped fight and use it to lock down Wukong when he dives; don't force a solo duel while your ultimate is down.
Wukong players list Amumu among the AP junglers that make Wukong a weaker pick; Wukong's P stacks armor, which does not reduce Amumu's magic damage.
Amumu's Q and R stun, giving him a way to catch Wukong when he dashes in with E or closes to spin with R; Wukong players advise respecting Amumu's hard crowd control.
How to play as Wukong
Pressure Amumu's predictable full clear, and avoid a full 5v5 while his R is ready; look for a pick or contest after he spends it.
Sources
These notes come from r/Jungle_Mains and r/Wukongmains, checked against the champions' abilities.