Main • Crash (performed by
Tim Lagasse) – a
puppet character who was created at the time of Wyatt's visit to Build-A-Bestie. He has a reckless and destructive personality where he often causes some damages in the Bernsteins' apartment. Crash is very gullible and dim-witted and often gets either himself or others in trouble, but overall he has a good heart and his intentions are usually in the right place. However, he can be prone to jealousy at times. Tim Lagasse was assisted in performing Crash by
Paul McGinnis and Rob Saunders who operated the arms, legs, and props of Crash. • Wyatt Bernstein (played by Cole Jensen) – a 12-year-old boy and the middle child in the Bernstein family among three sisters. Wyatt wishes to have a brother, which results in him building Crash at Build-A-Bestie. He is often exasperated by Crash's antics, especially when they get him in trouble too, but generally loves spending time with his brother. He is best friends with Pesto. • Cleopatra "Cleo" Bernstein (played by
Landry Bender) – Amanda, Wyatt and Jasmine's 13-year-old sister who shares a room with Wyatt. She makes products for her company called "CLEO" where she serves as the self-proclaimed CEO. It is revealed that she has a crush on Pesto. Cleo is often bossy, but is considered to be the superior member of the family. Cleo is very business-savvy and will sell just about anything from makeup and lotions to "monster truck" dirt to make money. • Amanda Bernstein (played by
Oana Gregory) – Wyatt, Cleo and Jasmine's 16-year-old sister. She's very popular, and Pesto has a crush on her. Amanda is very sociable, but can also be annoying to other characters (Especially Crash, Wyatt, and Pesto), She is the "it" girl for English and Australian
boys, and likes to enjoy herself and have fun. • Pesto (played by Aaron Landon) – Wyatt's friend. His parents own Iconic
Arcade, which is where he works. Pesto has a crush on Amanda and often tries to woo her, but fails miserably. He's often shown to be a momma's boy and mentions his mother in several episodes.
Recurring • Jasmine Bernstein (played by
Mckenna Grace) – Amanda, Wyatt, and Cleo's 6-year-old sister. Jasmine is the youngest member of the Bernstein family. She might be a cute and adorable little girl, but Jasmine is a spoiled brat. When Jasmine doesn't get her way she throws a tantrum. She owns a doll named Princess Glitter that Crash is in love with. • Melanie "Mel" Bernstein (played by
Mary Birdsong) – the wife of Karl and the mother of Amanda, Wyatt, Cleo and Jasmine. Mel doesn't approve of Crash. • Scottie (played by Curtis Harris) – one of Wyatt's friends at Linus Pauling Middle School. He is also the host of the school's show "Good Morning Linus Pauling." • Martin Poulos (played by
Danny Woodburn) – the
landlord of the Bernsteins' apartment building. He carries around a
swear jar which he swears into so that nobody can hear his profanity. In "Crashlemania," it's revealed that he was a
wrestler named "Plunger" when he was a wrestling partner of Coach Urkhart. • Rufus "The Slapper" Reeds (played by Zachary Conneen) – the school
bully at Linus Pauling Middle School. • Mrs. Lopez – A tenant in the Bernsteins' apartment building who is a known
cat lady. Although she owns a lot of cats, Mrs. Lopez also owns a
Basset Hound as seen in "Comic Book Crash." • Roland (played by
Ron Funches) – A newsdealer and
vendor that works at the newsstand in Wyatt's neighborhood. • Coach Urkhart (played by
Chip Chinery) – The coach of the wrestling team at Wyatt's school and one of Martin Poulos' old friends. He and Martin were a wrestling duo where Coach Urkhart was the "Cyclone." In "Health-O-Ween," it's revealed that Coach Urkhart is a member of the Nightmare Society. • Karl Bernstein (played by
Richard Ruccolo) – the husband of Mel and the father of Amanda, Wyatt, Cleo and Jasmine who debuts in Season 2. He works as a wildlife photographer and travels a lot. ==Broadcast==