Top 50 Animated Films All Time

I hve found this useful information from imdb

Top Rated "Animation" Titles

Rank	Rating	Title	Votes
1.	8.7	Toy Story 3 (2010)	105,734
2.	8.5	Sen to Chihiro no kamikakushi (2001)	110,491
3.	8.5	WALL·E (2008)	200,608
4.	8.3	Up (2009)	129,333
5.	8.3	Mononoke-hime (1997)	70,428
6.	8.3	Hotaru no haka (1988)	37,710
7.	8.2	Mary and Max (2009)	16,605
8.	8.2	The Lion King (1994)	150,657
9.	8.2	Toy Story (1995)	166,035
10.	8.2	Hadashi no Gen (1983)	1,918
11.	8.2	Tonari no Totoro (1988)	34,385
12.	8.2	How to Train Your Dragon (2010)	57,224
13.	8.1	Le roi et l'oiseau (1980)	1,424
14.	8.1	Finding Nemo (2003)	179,279
15.	8.1	Kaze no tani no Naushika (1984)	22,213
16.	8.1	Ratatouille (2007)	144,328
17.	8.1	Tenkû no shiro Rapyuta (1986)	22,927
18.	8.1	The Incredibles (2004)	171,498
19.	8.0	Hauru no ugoku shiro (2004)	49,518
20.	8.0	Macskafogó (1986)	3,839
21.	8.0	Shin seiki Evangelion Gekijô-ban: Air/Magokoro wo, kimi ni (1997)	6,243
22.	8.0	Beauty and the Beast (1991)	73,247
23.	8.0	Persepolis (2007)	27,010
24.	8.0	The Nightmare Before Christmas (1993)	85,626
25.	8.0	Monsters, Inc. (2001)	126,279
26.	8.0	Toy Story 2 (1999)	129,362
27.	8.0	Vals Im Bashir (2008)	19,583
28.	8.0	Tangled (2010)	15,204
29.	8.0	Vuk (1981)	2,199
30.	8.0	Byôsoku 5 senchimêtoru (2007)	4,322
31.	7.9	Mimi wo sumaseba (1995)	8,258
32.	7.9	Shrek (2001)	171,077
33.	7.9	Evangerion shin gekijôban: Ha (2009)	1,103
34.	7.9	Fantastic Mr. Fox (2009)	32,322
35.	7.9	Die Abenteuer des Prinzen Achmed (1926)	1,480
36.	7.9	Mind Game (2004)	2,542
37.	7.9	The Iron Giant (1999)	40,758
38.	7.9	Flåklypa Grand Prix (1975)	6,179
39.	7.9	Toki o kakeru shôjo (2006)	7,222
40.	7.9	Majo no takkyûbin (1989)	18,404
41.	7.9	Fantasia (1940)	31,414
42.	7.9	Jûbê ninpûchô (1993)	11,765
43.	7.9	Sennen joyû (2001)	5,687
44.	7.8	Snow White and the Seven Dwarfs (1937)	40,264
45.	7.8	Akira (1988)	41,521
46.	7.8	When the Wind Blows (1986)	2,394
47.	7.8	Aladdin (1992)	73,335
48.	7.8	L'illusionniste (2010)	1,967
49.	7.8	Kurenai no buta (1992)	12,935
50.	7.8	Kôkaku kidôtai (1995)	28,537

Bottom Rated "Animation" Titles

Rank	Rating	Title	Votes
1.	1.3	Xuxinha e Guto Contra os Monstros do Espaço(2005)	360
2.	1.3	Titanic: La leggenda continua... (2001)	1,021
3.	1.6	Bolívar: el héroe (2003)	369
4.	1.7	Kis Vuk (2008)	3,228
5.	2.3	Space Chimps 2: Zartog Strikes Back (2010)	376
6.	2.7	Doogal (2006)	2,684
7.	2.8	El ratón Pérez 2 (2008)	100
8.	2.8	The Ten Commandments (2007)	1,639
9.	2.9	Yûgiô Duel Monsters: Hikari no pyramid (2004)	3,021
10.	3.0	Dibu: La película (1997)	55

The formula for calculating the Top Rated 50 Titles gives a true Bayesian estimate:

 weighted rating (WR) = (v ÷ (v+m)) × R + (m ÷ (v+m)) × C 

where:

• R = average for the movie (mean) = (Rating)
• v = number of votes for the movie = (votes)
• m = minimum votes required to be listed in the Top 50 (currently 1000)
• C = the mean vote across the whole report (currently 6.8)

for the Top 50, only votes from regular voters are considered.

In order to appear in the Bottom 10 Titles chart the title must have received at least 1000 votes.

Reference: http://www.imdb.com/chart/animation