6) Double trouble.
In this one they are in Rio De Janeiro, Brazil, where they are discovered by USA government agents, to perform as doubles for two very rich people who has gotten in a lot of trouble with criminals. They fix the trouble in the customary fashion, with their fists and wits, and this also has one of the best fighting scenes with Bud Spencer i have seen ^^ He is more overweight than usual here, but moves just as fast as he usually do ^^ Absolutely hilarious!
7) Odds and evens.
Here they are brought together by fate. Bud being a happy truck driver, Hill is a government agent with many talents, tasked to bring down a criminal gambling gang, and after seeing Spencer using his fists on them after being harassed, he chooses to use him as a helping hand. But it turns out he also is his brother. A gambling themed movie, it has some funny scenes and lots of smackdowns ^^
8) Aladdin/Superfantagenio.
A Bud Spencer solo movie. To me, it has a very funny and distinct style. The sidekick here is a young boy i have never seen in any other movie, obviously based on Karate Kid, since he looks slightly like him, and has a fighting scene where he uses karate. Many hilarious moments, some very cheesy ones too, which just adds to the absurd hilariousness ^^
9) Flatfood in Italy/Piedone lo sbirro
Another Bud spencer solo movie. Most people would probably rate this higher on the list, and it should be too. It is a great crime movie on it's own, and one of four "Piedone"-movies. I have only seen this, since the others have only Italian voices. It is very good, Spencer fights great, it also has a great story.
10) Watch out, we're mad.
Doesn't say where it's situated, but it seems obvious it is in Italy somewhere. An English crooked criminal boss (with his crazy German psychologist sidekick) is determined to shut down a local tivoli area and build a skyscraper there, using dirty tactics. Bud and Hill are dragged into it when their dune buggy is totaled by the gang members. This one has some very hilarious acting and situations, also by the gang boss, which has several temper tantrums ^^ And the end fight scene has a very spectacular car driving scenes inside a restaurant, totaling the place ^^ The only reason i put this at the end of the list, is because of the music, which is a drag down.
Bonus mention: Bud Spencer has made his two different own crime series, named "Big Man", and "Extralarge". I have seen through them, and they are not as promising as the movies. One of them has a great fighting scene, with his biggest opponent of all his movies and series, which i have uploaded on youtube, and it's worth watching ^^ With some of the coolest and most catchy music i've heard in a fighting scene too ^^
Bud Spencer's biggest opponent
https://www.youtube.com/watch?v=RfhmPI2qZBA