Wario stuff:
Captain Syrup and the black sugar gang, Denpu the genie, Syrup's Castle, the S.S. Tea cup, Bobo, Dunk, DD, Cuckoo Condor, Cractus, Catbat... (pretty much all WL4 Bosses), the Music Box World, Rudy the Clown, Dr. Awero Stein, Princess Shokora (human form together with her cat form)...