The Troublesome Trio

The first time Johnny teams up with Niko is when Niko is doing jobs for Elizabeta Torres a local drug dealer while Niko is at her house she introuduces him to Johnny who will be heading up this drug deal so Niko and Playboy X another drug runner meet johnny in an abandoned housing complex Johnny heads up the meet, but turns out that Johnny suspects the buyer is not for real and he is met by undercover federal agents (FEDS) so as Johnny exits the building him self with the drugs and leave Niko and Playboy X to deal with the feds

The next time we encounter our two anti-heros together is on a diamond deal mission called "museum Piece" which shows Johnny and Niko teaming up once more to try and sell some diamonds that belong to Ray boccino the local mafia boss, when they meet up again Jonhhny says to Niko " lets hope this goes better than before, ya" so as the two of them go into the museum the deal is going good but then Luis Lopez (the guy you play in the Ballads of Gay Tony) apperars at the window and trys to kill everyone at the meet, While Johnny exits with the money Niko leaves with nothing and the diamonds are now where to be seen, Johnny gets on his parked hexer out side the museum and flees the scene of the crime.

The last time we hear of a conflicting story between Johnny and Niko is when Johnny kidnaps Niko's cousin Roman for the Russian Mafia to try and lure Niko to them but Niko saves his cousing sucessfully and never actually finds out that it was Johnny that kidnapped his cousin in the first place.