Best Friends

Goku and Krillin's friendship is one of those unique that I find within any media entertainment that involves friendship. Goku has the ability to become friends with anyone almost and is pure hearted, while Krillin is has a witty mouth (at least in the Japanese version) and often doesn't like to involve himself in battles if he can avoid it. The two are almost totally opposite and as they say, opposites attract. Krillin admires Goku for his abilities as a fighter and also they grew close during their training with Master Roshi. Goku, on the other hand, admires Krillin for his care of friends and asserting himself despite the dangers. While I cannot describe their friendship in a great amount or few amount of words, I do believe the following events and/or lines might help people understand the unique friendship these two have. More coming soon from the manga and movies.

Dragonball-
-Goku assures Krillin that he can see Jackie Chun's speed and that Krillin can as well, because they both had the same type of training.
-Krillin gets onto Goku to tell him to pull his pants up after showing his tail around, trying to get Goku to be modest or not embrass himself anymore.
-Krillin being killed by Tambourine and despite Goku being tired from his fight with Tien, he charges after Krillin's killer without caring about his lack of energy.

Dragonball Z-
-Krillin starts to cry a bit when Goku is dying from a mortal wound caused by Piccolo to help kill Raditz and tells him not to die.
-Krillin rushes to cut off Vegeta's tail when he is squeezing Goku to death almost, though he fails he feels bad thinking Goku will die once again.
-Goku rushes to Namek after learning Vegeta and a powerfu enemy are after the Dragonballs to save Bulma, Gohan, and Krillin.
-Goku transforms into a Super Saiyan against Frieza after he brutually murders Krillin and thinks that Krillin cannot be brought back to life. It should be noted he didn't act this way when Chaozu or the others died from fighting Nappa, even with the Earth's Dragonballs were useless.
-Krillin cries in happiness when Goku has recovered from his heart illness and flings onto the surprised Saiyan.
-Krillin reacts almost just as bad as Gohan does when Goku is killed by Cell and calls out for him before he disappears with Cell from Earth. Quickly though, Krillin reassures Gohan and states that he will miss Goku's comments after the Saiyan chooses not to return to life. Goku chooses not to return to life thinking that dangers come to Earth because of him.
-Krillin is one the first ones to rush and greet Goku when he visits for a day during the Majin Buu arc and continues to wave goodbye long after the Saiyan has returned to Otherworld.

Dragonball GT-
-Krillin and Goku have a final goodbye and have a friendly "spar" after the Omega Shenron events and both of their surprises, Krillin wins the friendly sparring matches. They both remember old times and Krillin comments that he misses them at times, when suddenly Goku vanishes leaving a confused Krillin and Master Roshi on Kame Island.