In my mind, the funniest eduardo moments are:
Fistful of Cereal:
When ed says to Mr. H:
"Mr Herriman why does it say in Bloo's file he's a doo doo head."
One False Movie:
"When eduardo thought he was farting at the footage. But bloo was just making sound effects to ed."
Blooooo:
"When Ed was running through the walls when he was scared to death and then he bounce back."