5. Jak and Daxter (Jak and Daxter Series)
I mean come on, these two make the title of the game. Jak and Daxter started out as a silent protagonist and a spunky deuteragonist who rides on the former's shoulders. Not much is said between the two though their friendship is undeniable. It isn't until Jak 2 where Jak finally got a voice and was able to respond to Daxter and the joking continued between these two best friends. They're so inseparable that it would have been blasphemy to include just Jak in the Playstation All-Stars game. The two don't exhibit much pain or sacrifice or any sort of real trouble between their relationship making it somewhat of a novelty. That being said, maybe they get along so well that they can magically avoid trouble.