Worm: To access, launch into space, then hold dumpster dive until underground; use bat to whack bombs into worm until it's dead. Monkey: To access, use hang glider when in blue sky (not space) and stay afloat for a few seconds; use bat to either whack bombs or bananas into monkey until it's dead. Tip: don't kill monkey until after getting the hard badge -- it's not very hard to dodge bananas while racking up as many trick points as you please.
To kill any tough enemy really quickly, just sacrifice a little HP, sit on them, and unload lightning. Sitting on the final boss with lightning, arc, and shield = instant kill.