"trusty sidekick" is a perfectly acceptable phrase that can be used in written English.
For example, "He was the hero's trusty sidekick, always ready to help when needed."
But fear remained my trusty sidekick.
"Thanks, kid, but I don't need a trusty sidekick".
Ice Cream with his trusty sidekick, Fudge Sauce: the bad guys.
Kirsten Scott, a mezzo-soprano, moved and sang gracefully as the muse and Nicklausse, Hoffmann's trusty sidekick.
According to the blurb, the tome will set its readers' whiskers aquiver with tales of how Orlov and his trusty sidekick conquered the world.
Our quickdraw renegade just keeps gun-slinging on Twitter, with plenty of covering fire from his trusty sidekick Piers, and lives to fight another day.
And even superfriends need trusty sidekicks to win a title.
For readers who enjoy intertextual connections, there are "Don Quixote" references dropped in throughout, including windmills, Dulcie (Dulcinea) and trusty sidekicks.
Now playing in Detroit is the Grind Line, the sequel, with Kris Draper reprising his role as Mr. Firebrand and the newcomers Darren Helm and Patrick Eaves serving as his trusty sidekicks.
It's time to recognize the trusty sidekicks to this year's important stories, without which, technology news would be a whole lot less mesmerizing.
At first William can't hit the side of a barn with his lance, so he and two scruffy but trusty sidekicks (Mr. Addy and Mr. Tudyk) repair to the forest for some crash training.
