Oldskool was a console cracking group, active on the Nintendo GameBoy Color (GBC), SNES and the Sega Mega Drive. There used to be a homepage but sadly it was never archived on the WayBack Machine.
The july 1995 release Arcade Classics listed Creep, Bad Karma, Rain Man, Blob, Fazwonga, Bart, Terminator, 2fast and Arcade as members at that time.
The june 1996 release WildLoad95 v1.0 listed Fazwonga, Creep, Terminator, Agel, Turrican, Kingpin, CQBS, Princip, Slaver, Ironcode, Mr. Z, Healon, Skyblazer, Interphase, Digital Messiah, Hero Zero, Lazy Lizard, Green Legend, Wild and Whiz as normal members, and Glue, Landy, Trilili, Jedi, Rip, Yoshi, TMB and Uxorious as members of the 'internet team' at that time.
Tokoro's Majong on april 6th 1998 listed Fazwonga, Creep, Blob and CQBS as members at that time. By the release of Super Family Winter Games on april 14th, Hudson Hawk was added to the member list in the nfo. That was also the member lineup in the Tekken 2 (no crackintro) release in october.
The january 1999 nfo's for The Mask, Terranigma S, Super Zugan 2 and Take The A-Train 3 Super Version, and the march one for Shanghai Pocket v1.1 (no cracktros, hence no entries here) listed Fazwonga, Creep, Blob, CQBS, Hudson Hawk, Turrican, Amptor and Gilligan as members at that time. An august nfo then revealed Blob, Turrican and Gilligan had disappeared, while McFly was a new addition.
A january 2001 nfo file had added Duz as a member, while Hudson Hawk was gone from the list.