Poll: Stewie Asks Hannibal Lecter for Tips: What Animated Character Would You Like to Enter What Movie?

Seth MacFarlane in Family Guy (1999)

Stewie (from Family Guy) in Silence of the Lambs: After Clarice exits another investigative quid-pro-quo exchange with Lecter, a sociopath baby enters, stage right, and tries to learn from Hannibal, as well. Of course, unlike Starling's, Stewie's motives are of a more, shall we say, nefarious nature. (suggested by rubyfruit)

Julie Kavner in Project Runway All Stars (2012)

In Broken Flowers, one of Don's exes turns out to be Marge Simpson (!) (from The Simpsons), a housewife from Springfield. (suggested by pbn)

Phil Harris in The Jungle Book (1967)

Baloo (from Jungle Book) in any Woody Allen film, in which Allen plays his typical character: Baloo is Woody Allen's therapist! (suggested by ElMaruecan82)

South Park (1997)

Eric Cartman (from South Park) in Jackie Brown: Cartman gets in touch with Ordell Robbie (Samuel L. Jackson). They become friends but soon the gun runner suspects that he and his weapons are only a part in Cartman's plan to conquer America and establish a fascist regime, which will likely see Ordell as a victim. Tension between the two rises, and a bloodbath becomes inevitable. (suggested by albstein)

Ginnifer Goodwin in Zootopia (2016)

Judy Hopps (from Zootopia) hops onto the set of a Bond film and the director is so impressed that Judy becomes the next "Bond girl!" (suggested by moatazaboalghuit)

Joe Alaskey in Duck Dodgers (2003)

Marvin the Martian (from Looney Tunes) in Star Trek: The U.S.S. Enterprise, on their original five year mission, encounters a creature bent on the destruction of Earth and Humanity: Marvin the Martian. Scotty manages to use the deflector shield to overpower the signal from the illudium Q-36 explosive space modulator and save the day, but Hugo (Marvin's dog) is somehow duplicated into 10,000 space dogs (reminiscent of Tribbles) and fills the starship. (contributed by jalapenoman)

Walt Disney in Fantasia (1940)

Mickey Mouse finds his way into Amélie and the two become romantically involved. What a couple! (suggested by borimor)

The Simpsons (1989)

Lisa Simpson (from The Simpsons) sashays onto the stage during the filming of Martin Scorsese's famous musical documentary and concert film, The Last Waltz. Her virtuoso sax skills inspire awe in musicians such as The Band, Bob Dylan, Muddy Waters, and Neil Young. That Lisa Simpson -- she's got spunk! (suggested by rubyfruit)

Looney Tunes: Back in Action (2003)

Taz (from Looney Tunes) joins the cast of Inside Out, personifying impatience, thus making him the sixth emotion. He is the comedic element, getting the other emotions in trouble as they try to keep him in check. (suggested by urbanemovies)

Clarence Nash in Grin and Bear It (1954)

Donald Duck in Mission Impossible: Ghost Protocol as part of Ian Hunt's IMF team. Donald joins them on the mission to Dubai and almost blows the mission when his equipment malfunctions and he loses control. (suggested by TheMovieSmith)

Bill Melendez in The Peanuts Movie (2015)

Snoopy, in-character as the Red Baron, appears in the skies of the movie, Top Gun. Move over, Tom Cruise and Val Kilmer, Snoopy is the real "Top Gun." (suggested by rubyfruit76)

Bender

Bender (from Futurama) enters the film of Ex Machina. Debate immediately erupts among viewers noticing his presence in the movie: will Bender develop a crush on Ava? Or will he compete with her? Will he be evaluated for human qualities and, if so, what will the verdict be? (suggested by TsarStepan)

Colin O'Meara, Susan Roman, and Thierry Wermuth in The Adventures of Tintin (1991)

Tintin (from The Adventures of Tintin) runs into one of the Prodosh Mitra (a.k.a. Feluda) movies, The Golden Fortress. Because he happens to run alongside Feluda, who is the target for crooks who think that he might have precious jewels, Tintin must then keep running, along with his dog. (suggested by Dibyayan_Chakravorty)

Kathleen Turner and Amy Irving in Who Framed Roger Rabbit (1988)

Jessica Rabbit (from Who Framed Roger Rabbit) struts into Basic Instinct: As Detective Nick Curran falls deeper into the allure of Catherine Tramell, he becomes equally infatuated with Jessica, one of Catherine's girlfriends, but is unsure of who is more lethally untrustworthy. (suggested by teriekwilliams-46153)

Makoto Furukawa in One Punch Man (2015)

Saitama (from One Punch Man) joins The Avengers to try to defeat the biggest threat yet: a group of villains armed with sophisticated weaponry -- as well as meteors, hurricanes, tornados and other natural disasters! Go, Saitama, go! We're counting on you to save the planet! (suggested by KhaledKalache)

Albert Brooks and Ellen DeGeneres in Finding Nemo (2003)

Dory (from Finding Nemo) stars in Memento: In this fractured narrative of a thriller, Dory joins Leonard on his quest to find the murderer of his wife. The only problem is that Dory's more severe memory loss results in a constant state of being lost and separated from Leonard. What follows is a double cat and mouse game of Dory constantly trying to find Leonard as Leonard tries to find his wife's killer. (suggested by pere-25366) (added 10.27.16)