|Charles "Chachi" Arcola|
|First appearance||"Hollywood (Happy Days)" - Part 1 (1977)|
|Last appearance||"Passages (Happy Days)" (1984)|
|Created by||Garry Marshall|
|Portrayed by||Scott Baio|
|Occupation||Works at Fonzie's Garage, and at Arnold's. Later student at Jefferson High School and musician.|
|Family||Louisa Fonzarelli Arcola Delvecchio (mother)|
|Spouse(s)||Joanie Cunningham Arcola|
|Relatives||Arthur Fonzarelli (cousin)
Grandma Nussbaum (grandmother)
Raymond "Spike" Fonzarelli (cousin)
Angel Fonzarelli (cousin)
Howard C. Cunningham (father-in-law)
Marion Kelp Cunningham (mother-in-law)
Chuck Cunningham (brother-in-law)
Richie Cunningham (brother-in-law)
Lori Beth Cunningham (sister-in-law)
Richie Cunningham, Jr. (nephew-in-law)
Alfred Delvecchio (stepfather)
Roger Phillips (cousin-in-law)
Leopold "Flip" Phillips (cousin-in-law)
K.C. Cunningham (cousin-in-law)
Father Delvecchio (stepuncle)
Ma Delvecchio (stepgrandmother)
Richard "Dick" Cunnigham (uncle-in-law)
Sean Cunningham (grandfather-in-law)
Rico Mastorelli (uncle)
Annette Mastorelli (cousin)
The character of Chachi is the younger cousin of Fonzie, first appearing on Happy Days in season 5, beginning in 1977. His main love interest is Joanie Cunningham, with their relationship becoming a common theme for episodes in later seasons. Chachi shares a close relationship with his older cousin Fonzie. Many times, Fonzie stepped in and was able to be the older brother figure that Chachi needed. Chachi is also very close to his mother and his step-father Al.
Together, Chachi and Joanie became aspiring musicians, and the spinoff series Joanie Loves Chachi was developed when Chachi's mother Louisa and new stepfather Al Delvecchio (the second owner of Arnold's) opened a new restaurant where Joanie and Chachi performed most of their music.
Joanie and Chachi returned to Happy Days when Joanie Loves Chachi was cancelled, and after them being broken up for a while in the final Happy Days episode, Joanie and Chachi marry.
Development and reception
After his initial appearance, the character of Chachi was expanded to a recurring character due to positive reception by fans, with Baio receiving up to 5,000 fan letters a week. When the writers began developing the character of Chachi as a musician, Baio was against the idea because he "didn't sing," but changed his mind based on the possibility of the fame associated with becoming a pop singer. His early catchphrase "Wa, wa, wa!" became popular with teenage girls. However, an attempt to spark a fashion trend by having Chachi frequently costumed with a bandana tied around his pant leg did not catch on.
The character was named after a street where the show's creator Garry Marshall had lived. There have been false rumors that circulated claiming that the broadcast of Joanie loves Chachi had high viewership numbers in Japan and Korea because the name "Chachi" sounds like slang term for "penis" in those countries.
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