Kyle Akerboom faces five counts, including recklessly endangering safety. No trial date was set; he returns to court March 11.
The other suspect, Griffin Lawson, is scheduled to stand trial March 26.
Officials say the two shot marbles from a wooded area using high-powered slingshots. Police say the men had been targeting vehicles for weeks, as part of a game. Some vehicles were dented, and others had smashed windows, and one motorcyclist was hit by a marble in the thigh.