A report on Heckle and Jeckle

The studio created many cartoon characters including Fanny Zilch, Mighty Mouse, Heckle and Jeckle, Gandy Goose, Sourpuss, Dinky Duck, Little Roquefort, the Terry Bears, Dimwit, and Luno; Terry's pre-existing character Farmer Al Falfa was also featured often in the series.

In 1979–1980, Filmation made television cartoons starring Mighty Mouse and fellow Terrytoon characters Heckle and Jeckle in a show called The New Adventures of Mighty Mouse and Heckle & Jeckle.

His studio's most famous character is Mighty Mouse, and also created Heckle and Jeckle, Gandy Goose and Dinky Duck.

Several studios would introduce characters that would become very popular and would have long-lasting careers, including Walt Disney Productions' Goofy (1932) and Donald Duck (1934), Warner Bros. Cartoons' Looney Tunes characters like Porky Pig (1935), Daffy Duck (1937), Bugs Bunny (1938–1940), Tweety (1941–1942), Sylvester the Cat (1945), Wile E. Coyote and Road Runner (1949), Fleischer Studios/Paramount Cartoon Studios' Betty Boop (1930), Popeye (1933), Superman (1941) and Casper (1945), MGM cartoon studio's Tom and Jerry (1940) and Droopy, Walter Lantz Productions/Universal Studio Cartoons' Woody Woodpecker (1940), Terrytoons/20th Century Fox's Gandy Goose (1938), Dinky Duck (1939), Mighty Mouse (1942) and Heckle and Jeckle (1946) and United Artists' Pink Panther (1963).

Fellow Terrytoons characters Heckle and Jeckle also appear in "Mighty's Wedlock Whimsy".

Ideas originally conceived for the story also included a sequence set at Marvin Acme's funeral, whose attendees included Eddie, Foghorn Leghorn, Mickey Mouse, Minnie Mouse, Tom and Jerry, Heckle and Jeckle, Chip n' Dale, Felix the Cat, Herman and Katnip, Mighty Mouse, Superman, Popeye, Olive Oyl, Bluto, Clarabelle Cow, Horace Horsecollar, the Seven Dwarfs, Baby Huey, and Casper the Friendly Ghost in cameo appearances.

The New Adventures of Mighty Mouse and Heckle & Jeckle is a 1979–1980 television series featuring newly produced Mighty Mouse and Heckle & Jeckle cartoons.

His father, also named Roy Halee, provided the singing voice for Mighty Mouse in late 1940s Terrytoons cartoons, as well as the voices of Heckle and Jeckle from 1951 through 1961.

In 1978, he played the title character on Fangface and later in its spin-off, Fangface and Fangpuss, and also voiced Heckle and Jeckle and Quacula on The New Adventures of Mighty Mouse and Heckle & Jeckle, and Spike, Tyke, Droopy, Slick Wolf and Barney Bear on The Tom and Jerry Comedy Show.

In 1947, St. John Publications took over the licensing of Terrytoons characters; Gandy Goose continued to appear in Terry-Toons Comics and Mighty Mouse as well as Dinky Duck, Heckle and Jeckle, and his own self-titled series, which ran four issues from Mar. 1953 to Nov. 1953.