Data, Spike and Whitey

Data, Spike and Whitey are members of Griff Tannen's gang, in the sci-fi comedy movie Back to Back to the Future Part II. Like Biff Tannen's gang, they tend to be destructive bullies for their own amusement.

Biography
When Marty, Doc Brown, and Jennifer head to the year 2015, Doc Brown told Marty that his future son Marty McFly Jr. will end up in jail thanks to Griff and his gang for getting him involved in a robbery. To that end, Marty disguised himself as his own son to prevent him from going to jail.

Cafe 80's
When Marty goes to the Cafe 80's, he encountered both old Biff and Griff, who turned out to be Biff's grandson. When Marty Jr. went inside the Cafe 80's, Griff mistakenly thought that Marty Jr. had left the Cafe. Griff then brings over Data, Spike and Whitey to convince Marty Jr. to join them to a robbery. Not taking "No" for an answer, Griff gets Data, Spike and Whitey to mess around with Marty Jr., right before Marty took his place. Marty said "No" to Griff and tries to walk away, but Griff calls Marty "Chicken" and tried to hit him with a retractable bat. However, Marty managed to escape both Griff and the bullies.

The Hoverboard Chase and Defeat
Marty borrowed a little girl's hoverboard to escape the gang. After ending up into a lake, Marty's hoverboard stopped because it doesn't work on water. Griff then took out his own hoverboard as Data, Spike and White follow him, hoping that Griff will smack down Marty with the bat. Griff then tries to hit Marty with his bat, but Marty intentionally drops himself into the water, causing Griff to lose his balance. This causes Griff and his gang to crash into the courthouse.

Data, Spike, and Whitey are last seen being arrested along with Griff for their actions, which alters the future timeline and prevents from Marty Jr. from getting arrested.