An alien sidekick may not be your typical companion, but it sure adds an interesting twist to any story. If you're tired of using the same old term, there are several synonyms you can use to spice things up. For instance, instead of "alien sidekick," you could use "extraterrestrial companion," "cosmic buddy," "otherworldly pal," or "intergalactic partner." Each of these synonyms offers a unique perspective on what it means to have an alien by your side. Whether you're writing a sci-fi novel, a comic strip, or a screenplay, be sure to play around with these synonyms to give your readers something new to enjoy.