Complete Linkable Characters list compiled and courtesy of Gameskinny.
The lists below shows the specific characters who share the same Link Skills.
Hero
Hercule - Champion's Honor (R)
Hercule - Undisputed Champion (N)
Nail - Facing Fate (R)
Nail - Namek's Last Warrior (R)
Hercule - Hero Chosen by Earth (SR)
Nail - Call of Duty (SR)
Infighter
Videl - Slayer of Evil (N)
Saibamen - Earthborn Warrior (N) (All variations)
Borgos - Warrior of Few Words (R)
Nappa - Devastating Destruction (R)
Nappa - Inevitable Preemptive Strike (R)
Recoome - Dazzling Destruction (R)
Recoome - Death Sentence (R)
Shen - Exquisite Technique (R)
Videl - Paragon of Justice (R)
Yajirobe - A Moment's Chance (R)
Yajirobe - Cowardly Savior (R)
Yamcha - The One and Only (R)
Yamcha - Unwavering Confidence (R)
Goku - The Saiyan Among Us (SR)
Master Roshi - Secrets of the Turtle Style (SR)
Nappa - Cruel Tactics (SR)
Nappa - Elite Warrior's Rage (SR)
Nappa - Saiyan Baptism (SR)
Recoome - Dever-Ending Assault (SR)
Videl - Blazing Justice (SR)
Yamcha - Indomitable Human Spirit (SR)
Borgos - Warrior of Few Words (SSR)
Kamehameha
Cell Jr. - Tiny Terror (R)
Krillin - Wisdom and Experience (R)
Cell (1st Form) - Android Evolution (SR)
Cell (1st Form) - Time-traversing Evil (SR)
Goku - Determined Defender (SR)
Goku - The Saiyan Among Us (SR)
Goku (Kid) - Innocent Challenger (SR)
Jackie Chun - Seasoned Sensei (SR)
Master Roshi - Martial Guidance (SR)
Master Roshi - Secrets of the Turtle Style (SR)
Super Saiyan 2 Goku - The Fruits of Training (SR)
Yamcha - Burning Spirit (SR)
Super Saiyan Gohan (Teen) - Successor of the Strongest (SSR)
Super Saiyan Goku - Convulsing Rage (SSR)
Super Saiyan Goku - Supreme Warrior Awakened (SSR)
Master and Pupil
Tien - Lightning Onslaught (R)
Tien - Unwavering Spirit (R)
Chiaotzu - Daring Interception (R)
Chiaotzu - Power at the Eleventh Hour (SR)
Chiaotzu - The Gifted One (SR)
Chiaotzu - Trickster (R)
Master Shen - Crane School's Prestige (SR)
Tien - Aura Unleashed (SR)
Tien - Respect to the Strong (SR)
Mechanical Menaces
Pirate Robot - Deep Sea Guardian (N)
Android #16 - Nature-loving Warrior (R)
Android #16 - Ironclad Intentions (R)
Fusion Machine Pilaf - Unquenchable Ambition (R)
Android #16 - Power Unleashed (SR)
Android #16 - The Warrior Awakens (SR)
Messenger from the Future
Trunks (Teen) - From Hell and Back (R)
Cell (1st Form) - Android Evolution (SR)
Cell (1st Form) - Time-traversing Evil (SR)
Trunks (Teen) - Blitz Blade (SR)
Trunks (Teen) - Hawk Eyes (SR)
Trunks (Xeno) - Envoy from Beyond (SSR)
Metamorphosis
Zarbon - Confident Grin (R)
Zarbon - Display of Strength (R)
Frieza (1st Form) - Despair's Onslaught (SR)
Frieza (1st Form) - Emperor of Iniquity (SR)
Zarbon - Evil Elegance (SR)
Zarbon - Hidden Strength (SR)
Money Money Money
Hercule - Undisputed Champion (N)
Videl - Slayer of Evil (N)
Hercule - Champion's Honor (R)
Videl - Buried Passion (R)
Videl - Paragon of Justice (R)
Hercule - Hero Chosen by Earth (SR)
More Than Meets the Eye
Pintar - Unarmed Power (N)
Drum - Terror's Descent (R)
Namekians
Nail - Facing Fate (R)
Nail - Namek's Last Warrior (R)
Piccolo - Aloof Warrior (R)
Piccolo - Burdened by Destiny (R)
Nail - Call of Duty (SR)
Piccolo - Demonic Pride (SR)
Piccolo - Stern Teacher (SR)
Piccolo - Namekian Rage (SSR)
New
Saibamen - Earthborn Warrior (N) (All variations)
Nappa - Devastating Destruction (R)
Nappa- Inevitable Preemptive Strike (R)
Nappa - Elite Warrior's Rage (SR)
Over 9000
Vegeta - Invader from Afar (R)
Nappa - Sadistic Strongman (R)
Vegeta - Saiyan Elite (SR)
Prodigies
Piccolo - Aloof Warrior (R)
Vegeta - Invader from Afar (R)
Frieza (1st Form) - Despair's Onslaught (SR)
Frieza (1st Form) - Embodiment of Evil (SR)
Frieza (1st Form) - Emperor of Iniquity (SR)
Frieza (2nd Form) - Nightmare Transformed (SR)
Frieza (3rd Form) - Savage Speed (SR)
Mecha Frieza - Reborn for Revenge (SR)
Piccolo - Demonic Pride (SR)
Piccolo - Stern Teacher (SR)
Vegeta - Extreme Elite's Pride (SR)
Vegeta - Genius of War (SR)
Vegeta - Saiyan Elite (SR)
Vegeta (Kid) - Prince of Destiny (SR)
Frieza (Final Form) - Horror From Hell (SSR)
Piccolo - Namekian Rage (SSR)
Respect
Captain Ginyu - Captain's Merit (R)
Captain Ginyu - Considerate Captain (R)
Captain Ginyu - Battle Prowess (SR)
Captain Ginyu - Honorable Fighter (SR)
Master Roshi - Martial Guidance (SR)
Revival
Cyborg Tao - Mercenary's Mettle (SR)
Mecha Frieza - Reborn for Revenge (SR)
Rival Duo
Tien - Lightning Onslaught (R)
Tien - Unwavering Spirit (R)
Yamcha - The One and Only (R)
Yamcha - Unwavering Confidence (R)
Tien - Aura Unleashed (SR)
Tien - Respect to the Strong (SR)
Yamcha - Burning Spirit (SR)
Yamcha - Indomitable Human Spirit (SR)
Yamcha - Secret Arts Unleashed (SR)
RR Army
Red Ribbon Army - Army of Infamy (N)
Red Ribbon Army - Infamous Army (All variations)
Dr. Gero - Precise Action (R)
Dr. Gero - Mad Scientist's Revenge (R)
Dr. Gero - Cunning Strategy (SR)
Dr. Gero - Red Ribbon Army's Grudge (SR)
Saiyan Pride
Bardock - Star-crossed Fate (R)
Borgos - Warrior of Few Words (R)
Shugesh - Warrior of Ferocity (R)
Tora - Warrior of Conviction (R)
Fasha - Warrior of Daring (SR)
King Vegeta - Proud Royalty (SR)
Super Saiyan Bardock - The First Awakened (SSR)
Saiyan Warrior Race
Borgos - Warrior of Few Words (R)
Nappa - Devastating Destruction (R)
Nappa - Inevitable Preemptive Strike (R)
Nappa - Sadistic Strongman (R)
Raditz - Menacing Alien Warrior (R)
Raditz - Space Invader (R)
Shugesh - Warrior of Ferocity (R)
Tora - Warrior of Conviction (R)
Vegeta - Invader from Afar (R)
Fasha - Warrior of Daring (SR)
King Vegeta - Proud Royalty (SR)
Nappa - Cruel Tactics (SR)
Nappa - Elite Warrior's Rage (SR)
Nappa - Saiyan Baptism (SR)
Raditz - Cocky Counter (SR)
Raditz - Peerless Saiyan (SR)
Vegeta - Extreme Elite's Pride (SR)
Vegeta - Genius of War (SR)
Vegeta - Saiyan Elite (SR)
Vegeta (Kid) - Prince of Destiny (SR)
Super Saiyan 2 Goku - The Fruits of Training (SSR)
Super Saiyan Bardock - The First Awakened (SSR)
Super Saiyan Gohan (Teen) - Successor of the Strongest (SSR)
Super Saiyan Goku - Convulsing Rage (SSR)
Super Saiyan Goku - Supreme Warrior Awakened (SSR)
Super Saiyan Vegeta - Pride Regained (SSR)
Super Saiyan Vegeta - Super Attack Supreme (SSR)
Shocking Speed
Frieza (3rd Form) - Savage Speed
Frieza (Final Form) - Horror from Hell
Sibling
Bardock - Star-crossed Fate (R)
Gohan (Kid) - Slumbering Strength
Goku - Overflowing Resolve (R)
Raditz - Menacing Alien Warrior (R)
Raditz - Space Invader (R)
Gohan (Kid) - Furious Impact (SR)
Goku - Determined Defender (SR)
Goku (Kid) - Innocent Challenger (SR)
Raditz - Cocky Counter (SR)
Raditz - Peerless Saiyan (SR)
Vegeta (Kid) - Prince of Destiny (SR)
Speedy Retribution
Burter - Speed Impulse (R)
Burter - Unfathomable Speed (R)
Yamcha - The One and Only (R)
Yamcha - Unwavering Confidence (R)
Burter - Speed Tactics (SR)
Yamcha - Burning Spirit (SR)
Yamcha - Indomitable Human Spirit (SR)
Yamcha - Secret Arts Unleashed (SR)
Strongest Duo on Earth
Goku - Overflowing Resolve (R)
Goku - Determined Defender (SR)
Piccolo - Stern Teacher (SR)
Piccolo - Namekian Rage (SSR)
Super Saiyan
Super Saiyan 2 Goku - The Fruits of Training (SSR)
Super Saiyan Bardock - The First Awakened (SSR)
Super Saiyan Gohan (Teen) - Successor of the Strongest (SSR)
Super Saiyan Goku - Convulsing Rage (SSR)
Super Saiyan Goku - Supreme Warrior Awakened (SSR)
Super Saiyan Vegeta - Pride Regained (SSR)
Super Saiyan Vegeta - Pride Regained (SSR)
Super Saiyan Vegeta - Super Attack Supreme (SSR)
Supreme Warrior
Cyborg Tao - Mercenary's Mettle (SR)
Jackie Chun - Seasoned Sensei (SR)
Master Roshi - Martial Guidance (SR)
Master Roshi - Secrets of the Turtle Style (SR)
Mercenary Tao - Unrivaled Assassin (SR)