Question: What was the last movie that Barry Kooser worked as a background artist for?

Context paragraphs:
Bill Tiller: Bill Tiller is an American computer game designer, writer, and artist.  At LucasArts, he was the lead artist and art director of "The Dig", the lead background artist on "The Curse of Monkey Island", and the lead artist on "Indiana Jones and the Infernal Machine".  He created the games "A Vampyre Story" and "Ghost Pirates of Vooju Island" for Autumn Moon Entertainment, a studio he co-founded with Mike Kirchoff in 2002.  He worked as a game designer on the iOS title Perils of Man.

Background artist: A background artist or sometimes called a background stylist or background painter is one who is involved in the process of animation who establishes the color, style, and mood of a scene drawn by an animation layout artist.  The methods used can either be through traditional painting or by digital media such as Adobe Photoshop.  Traditional methods involved painting entire production scenes for a television program or film.  Current methods may involve painting primarily background keys or the establishing shot while production background artists paint the corresponding background paintings.

Toby Bluth: Frederick L. "Toby" Bluth (July 11, 1940 – October 31, 2013) was a Texas-born American illustrator who worked on many Disney films and others as animator, background artist, and production designer.  He had a long career writing and illustrating children's books, not to mention performing and or directing, nearly one hundred musicals, both on Broadway and off.  His artwork is prominently displayed at most of the Disney theme parks around the world.  He was the younger brother of Don Bluth, whom he collaborated with on both theater and animation.

David Weidman: David Weidman (June 28, 1921 – August 6, 2014) was an American animator, animation artist and silkscreen print artist known for his mid-century modern works, including posters, prints and ceramics.  Weidman began his career in animation as a background artist during the 1950s and 1960s.  During his later life, Weidman's silkscreens were featured in the sets of the AMC television series, "Mad Men", which revived interest in his work.  In 2010, the "Los Angeles Times" referred to Weidman as possibly "the most famous unknown artist."

James Coleman (American artist): James Coleman (born 1949) is an American painter who has worked for Disney as a background artist on numerous animated features.  In 1991, after twenty-two years working for Disney, James left to pursue the true passion in his life, fine art.

Brother Bear: Brother Bear is a 2003 American animated comedy-drama film produced by Walt Disney Feature Animation and released by Walt Disney Pictures.  It is the 44th Disney animated feature film.  In the film, an Inuit boy named Kenai pursues a bear in revenge for a battle that he provoked in which his oldest brother Sitka is killed.  He tracks down the bear and kills it, but the Spirits, angered by this needless death, change Kenai into a bear himself as punishment.  In order to be human again, Kenai must travel to a mountain where the Northern lights touch the earth, and learn to see through another's eyes, feel through another's heart, and discover the meaning of brotherhood.

Miki Hayasaka: Miki Hayasaka (早坂未紀 , Hayasaka Miki , b. 5 September 1955) is an illustrator and manga artist who was born in Toyama Prefecture, Japan.  After graduating from high school in 1973, he moved to Tokyo and began attending classes at Chiyoda Designer Academy, though he left before completing his degree.  During the mid-1970s, he worked as a background artist for Shinji Wada, helping with works such as "Sukeban Deka".  He joined the dōjinshi circle Trouble Maker (トラブルメーカー , Toraburu Mēkā ) in 1975, and worked as an assistant to Motoka Murakami during the mid- to late 1970s.

Walter Peregoy: Alwyn Walter "Walt" Peregoy (November 17, 1925 – January 16, 2015) was an American artist who was a color stylist and background artist for animated cartoons.  Among the studios he worked for were Walt Disney Productions 1951–1964, 1974–1983, Format Films and Hanna-Barbera (1968–1971 & 1973).  He received little publicity over his career, but was acclaimed for his avant-garde style.  His dedication, creativity and contributions to animation while at Disney earned Peregoy the honor of being inducted into the Disney Legends roster in 2008.

Kōji Yamamura: Kōji Yamamura (山村 浩二 , Yamamura Kōji , born June 4, 1964) is a Japanese independent animator who, after leaving a career as a background artist at an animation studio, directs, writes, edits, animates, creates the model sheets and background art for and sometimes produces his own short films and has worked on many commissions such as music videos, television advertisements, title sequences and station idents, both on his own and under or with other directors.  He is also a regular illustrator of children's literature and textbooks.

Barry Kooser: Barry R. Kooser is an American artist, painter, and documentary filmmaker who worked at Walt Disney Feature Animation Studios between 1992 and 2003 as a background artist on films such as "The Lion King", "Pocahontas", "Mulan", "Lilo & Stitch", and as background supervisor on "Brother Bear".  After leaving Disney, he worked independently as a painter exhibiting and selling fine art in galleries around the US.  While teaching animation and story-boarding at Rocky Mountain College of Art + Design, he met Worker Studio founder Michael "Ffish" Hemschoot, and became a partner at the Colorado animation studio.  Barry has since left Worker Studio.  He is the Founder, Executive Producer and Director at Many Hoops Productions.

Supporting paragraphs: Barry Kooser Brother Bear
Answer: Brother Bear