The Rescuers (1977)

Walt Disney's 23rd full-length, [traditionally] animated motion picture

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Villain: Madam Medusa
Henchlings: Mr. Snoops, Brutus & Nero

Cast/Crew info (from IMDB.com)

Directed by 

John Lounsbery
Wolfgang Reitherman
Art Stevens

Writing Credits  

Margery Sharp ... (suggested by 'The Rescuers' and 'Miss Bianca' by)
 
Larry Clemmons ... (story) &
Ken Anderson ... (story) &
Frank Thomas ... (story) &
Vance Gerry ... (story) &
David Michener ... (story) &
Ted Berman ... (story) &
Fred Lucky ... (story) &
Burny Mattinson ... (story) &
Dick Sebast ... (story)

Cast (in credits order) verified as complete  

...
Bernard (voice)
...
Miss Bianca (voice)
...
Madame Medusa (voice)
...
Mr. Snoops (voice)
...
Ellie Mae (voice)
...
Luke (voice)
...
Orville (voice)
...
Rufus (voice)
...
Penny (voice)
...
The Chairman (voice)
...
Gramps (voice)
...
Evinrude (voice) (as James Macdonald)
...
Rabbit (voice)
...
TV Announcer (voice) (as Bill McMillan)
...
Digger (voice)
...
Owl (voice)
Rest of cast listed alphabetically:
...
German Mouse (voice) (uncredited) (unconfirmed)
...
Brutus & Nero - Medusa's Pet Crocodiles (voice) (uncredited)
...
The Balladeer (voice) (uncredited)

Produced by 

Ron Miller ... executive producer
Wolfgang Reitherman ... producer

Music by 

Artie Butler ... (musical score composed by)

Film Editing by 

James Koford ... (as Jim Koford)
James Melton

Art Direction by 

Don Griffith

Production Management 

Don A. Duckwall ... production manager (as Don Duckwall)

Second Unit Director or Assistant Director 

Jeffrey C. Patch ... assistant director (as Jeff Patch)
Richard Rich ... assistant director

Art Department 

Alex Mann ... blue sketch artist (uncredited)

Sound Department 

Herb Taylor ... sound

Visual Effects by 

Jack Buckley ... effects animator
James L. George ... effects animator
Ted Kierscey ... effects animator
Dorse A. Lanpher ... effects animator
Dick N. Lucas ... effects animator (as Dick Lucas)

Animation Department 

Dale Baer ... character animator
Daniela Bielecka ... background painter
Don Bluth ... directing animator
Ron Clements ... character animator
Jim Coleman ... background painter
Leroy Cross ... key assistant animator
Guy Deel ... layout
Al Dempster ... color stylist
Andy Gaskill ... character animator
Gary Goldman ... character animator
Stan Green ... key assistant animator
Ann Guenther ... background painter
Bill Hajee ... character animator
Joe Hale ... layout
Chuck Harvey ... character animator
Harry Hester ... key assistant animator
Ollie Johnston ... directing animator
Milt Kahl ... directing animator
Glen Keane ... character animator
Thomas W. Lay Jr. ... layout (as Tom Lay)
Bob McCrea ... character animator
Cliff Nordberg ... character animator
Dale Oliver ... key assistant animator
John Pomeroy ... character animator
Sylvia Roemer ... layout
Walt Stanchfield ... key assistant animator
Art Stevens ... character animator
Dave Suding ... key assistant animator
Frank Thomas ... directing animator
Chuck Williams ... key assistant animator
Randy Cartwright ... assistant animator (uncredited)
Ed Gombert ... assistant animator (uncredited)
Heidi Guedel ... animator (uncredited)
Ron Husband ... animator (uncredited)
Dick Sebast ... animator (uncredited)
Tad Stones ... assistant animator (uncredited)
Hank Tucker ... inbetween artist (uncredited)

Music Department 

Artie Butler ... conducted by: musical score
Evelyn Kennedy ... music editor
María Medina ... Mexican version (uncredited) / song performer (uncredited)
Edmundo Santos ... lyrics: Spanish version (uncredited)

Other crew 

Eric Larson ... titles
Burny Mattinson ... titles
Mel Shaw ... titles (as Melvin Shaw)
Crew verified as complete