For those unaware, Randy can't speak. He can play sound effects from his mouth (like a weird magic speaker), but he can't actually talk himself. Though if a sound effect is a scream, a voice line, or anything like that, he should have no trouble. To combat this, Randy can still somewhat communicate with sound effects, gestures, and of course, a magic cartoon sign that says what he thinks. Here's some sprites of him holding a sign, just for fun. (Please don't abuse this power)
Oh and, don't let him give the sign to anyone else. It's a cartoon sign that just prints what you think, so lets stick to Randy's thoughts alone yeah?