Misc: what cigarette claimed to 'separate the men from the boys'?

Questions

An alien creature in a funny hat has opposed both Bugs Bunny and Daffy Duck. Where is he from?

Benny and Cecil were at odds with whom?

Bugs always finds himself at the wrong end of a gun, usually toted by either Elmer Fudd or who?

Casper the Friendly Ghost frolicked with which witch?

1 x 1 =?