Best Animation film as per my view :-
1) Spirited Away-(8.6/10) In the middle of her family's move to the suburbs, a sullen 10-year-old girl wanders into a world ruled by gods, witches, and monsters; where humans are changed into animals; and a bathhouse for these creatures.
2)Grave of the Fireflies-(8.3/10)- A tragic film covering a young boy and his little sister's struggle to survive in Japan during World War II.
3) Wall E- (8.5/10)- In the distant future, a small waste collecting robot inadvertently embarks on a space journey that will ultimately decide the fate of mankind.
4) UP-(8.4/10) By tying thousands of balloon to his home, 78-year-old Carl Fredricksen sets out to fulfill his lifelong dream to see the wilds of South America. Right after lifting off, however, he learns he isn't alone on his journey, since Russell, a wilderness explorer 70 years his junior, has inadvertently become a stowaway on the trip.
5) Finding Nemo- (8.2/10) A father-son underwater adventure featuring Nemo, a boy clownfish, stolen from his coral reef home. His timid father must then travel to Sydney and search Sydney Harbour to find Nemo.
6) Coraline- (7.8/10) An adventurous girl finds another world that is a strangely idealized version of her frustrating home, but it has sinister secrets.
7) Kung Fu Panda- (7.7/10) In the Valley of Peace, Po the Panda finds himself chosen as the Dragon Warrior despite the fact that he is obese and a complete novice at martial arts.
8) Astro Boy- (6.4/10) Set in futuristic Metro City, Astro Boy is about a young robot with incredible powers created by a brilliant scientist in the image of the son he has lost.Though the rating was not good but film is better than the rating believe me.
Link- Astro Boy (2009) - IMDb
9) Ratatouille- (8.1/10) Remy is a young rat in the French countryside who arrives in Paris, only to find out that his cooking idol is dead. When he makes an unusual alliance with a restaurant's new garbage boy, the culinary and personal adventures begin despite Remy's family's skepticism and the rat-hating world of humans.
10) Cars- (7.4/10) A hot-shot race-car named Lightning McQueen gets waylaid in Radiator Springs, where he finds the true meaning of friendship and family.
11)Mary and Max (8.2/10) A tale of friendship between two unlikely pen pals: Mary, a lonely, eight-year-old girl living in the suburbs of Melbourne, and Max, a forty-four-year old, severely obese man living in New York. (Thanks to sam9s for suggesting such a great movie)
12) How to Train Your Dragon- (8.2/10) A hapless young Viking who aspires to hunt dragons becomes the unlikely friend of a young dragon himself, and learns there may be more to the creatures than he assumed.
13) Spirit: Stallion of the Cimarron- (6.6/10) As a wild stallion travels across the frontiers of the Old West, he befriends a young human and finds true love with a mare.
Link- Spirit: Stallion of the Cimarron (2002) - IMDb
14) Chicken Run- (7.3/10) Chicken Run is a comedy escape drama with a touch of passion set on a sinister Yorks chicken farm in 1950's England
15)Despicable Me- (7.5/10) When a criminal mastermind uses a trio of orphan girls as pawns for a grand scheme, he finds himself profoundly changed by the growing love between them.
16) Monsters vs Aliens- (6.7/10) When a meteorite from outer space hits a young woman and turns her into a giant monster, she is taken to a secret government compound where she meets a ragtag group of monsters also rounded up over the years.
17) Megamind- (7.3/10) The supervillain Megamind finally conquers his nemesis, the hero Metro Man... but finds his life pointless without a hero to fight.
18) Cloudy with a Chance of Meatballs- (7.1/10) The most delicious event since macaroni met cheese. Inspired by the beloved children's book, the film focuses on a town where food falls from the sky like rain.
19)Pinocchio (1940)- (7.7/10) A living puppet, with the help of a cricket as his conscience, must prove himself worthy to become a real boy.
20) The Princess and the Frog - (7.3/10) A fairy tale set in Jazz Age-era New Orleans and centered on a young girl named Tiana and her fateful kiss with a frog prince who desperately wants to be human again.