Where can i download classic cartoons for free? Like classic casper, betty boop, popeye, etc. Preferably in .avi format

Theres a specific one that i have been looking for, for forever but cant find it.
Casper- Boo Moon

If anyone can help me find this one i will be eternally greatful!!!!!!

I love the original Woody Woodpecker, Baby Huey, Casper....How about you?

All the Casper movies have his uncles in them
But did the uncles come out in the old cartoon version of Casper?

What is your favourite classic cartoon/cartoons, mine would be
1. Tom & Jerry
2. Looney Tunes
3. Little Audrey
4. Little Lulu
5. Casper the friendly ghost
6. Mickey Mouse
7. Popeye
8. Donald Duck
9. The Flintstones
10. Betty Boop

1. Popeye
2. Brutus
3. Roadrunner
4. Skeletor
5. Transformers
6. Tom
7. Jerry
8. Casper the Friendly Ghost
9. The big spider thing on Johnny Quest
10. Betty Boop

And the coach: Elmer Fudd, AKA Jerry Jones