Here is a listing of all of the enemies found within The Legend of Zelda: Skyward Sword.
Armos
Beamos
Big Blin
Bokoblin
Chu Chu
Deku Baba
Demonic Kitty
Electric Rollobite
Fugu
Gleeok
Guardian
Kargorok
Keese
Lizalfos
Mechat
Octorock
Peahat
Pyrup
Scorpion Larva
Sentry Sentinel
Skulltula
Stalfos
Stalfos Warrior
Toadpoli
Walltula