Weapon X (X-Men (TV series))
In the X-Men animated series, the Weapon X program was responsible for Wolverine's adamantium implants and false memories. The Program, directed by The Professor and Dr. Cornelius, captured the four members of Team X (Logan, Creed, Maverick and Silver Fox) in order to brainwash them to become an elite team of mind-controlled assassins. However, Wolverine escaped and his rampage through the Weapon X HQ's allowed Creed, Maverick and Silver Fox to escape.
Dr. Cornelius
Abraham Cornelius appears in the X-Men 2 part episode "Out of the Past".
Professor Oyama
In X-Men, the Professor (from Weapon X) is Lady Deathstrike's father (Professor Oyama, making him an amalgamation of Lord Dark Wind and Professor Thorton), the inventor of the adamantium bonding process.
Talos
Shiva appeared in the X-Men animated series episode Weapon X, Lies and Videotape. Due to network censorship, the robot's name was changed to Talos.