Longshot or the bow, both are useful, but against enemies I prefer the bow. Though it isn't free because of the arrows...
And Megaton hammer is useful as well. These are the best in my opinion.

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Nayru Awards 09: Most Likely to be an Evil, Typing Cat
MISS NESI IS A DINNIE-NAYRULIAN HYBRID ~ Foxheart
Silly Nessie. Loch Ness Monsters don't even purr. :3 ~ Zero of Time
Nesi, based on your avy, you strike me as Astarael's little internet sister. ~ VictorZamora
Sorry but Nesi is the forum's cat ~ candc32