Jack Power

* Alex Power - sibling
* Angel - *Enemy*: Power Pack fight with Angel when he has become Death (X-Factor #25)
* Apocalypse - *Enemy*: Power Pack discuss Apocalypse with members of X-Factor (XF #25)
* Artie Maddicks - they know each other after the Mutant Massacre (X-Factor An. #2) and meet in Central Park (X-Factor An. #2)
* Beast - they join forces in the tunnels during the Mutant Massacre (Power Pack #27) and against Quicksilver and Maximus (X-Factor An. #2)
* Caliban - Power Pack save Caliban from the Mutant Massacre (#27)
* Callisto - they have been allies (PP #11-12, X-Men #195)
* Captain Britain - Excalibur attempted to liberate Power Pack from Nightmare (Excalibur #29)
* Cloak - they become friends when they bring justice to the drug lord Diangelo (Power Pack #6-8)
* Cyclops - they join forces in the tunnels during the Mutant Massacre (Power Pack #27) and against Quicksilver and Maximus (X-Factor An. #2) and Pestilence (XF # 25)
* Dagger - they become friends when they bring justice to the drug lord Diangelo (Power Pack #6-8)
* Dragon Man - they joined forces in defeating the drug lord Diangelo (Power Pack #7-8)
* Edwin Jarvis - Alex hears Franklin Richards talk of Jarvis (Power Pack #27)
* Fandral - Power Pack and Warriors 3 combine forces to defeat Bogeyman in Central Park (PP #15)
* Franklin Richards - Franklin joined the Power Pack and lived with them. Nickname: "Little Bro" (PP #54)
* Hogun - Power Pack and Warriors 3 combine forces to defeat Bogeyman in Central Park (PP #15)
* Human Torch - the Power Pack kids discuss the Fantastic Four at home (PP #5)
* Iceman - they join forces in the tunnels during the Mutant Massacre (Power Pack #27) and against Quicksilver and Maximus (X-Factor An. #2)
* Jean Grey - they join forces in the tunnels during the Mutant Massacre (Power Pack #27) and against Quicksilver and Maximus (X-Factor An. #2) and Pestilence (XF # 25)
* Julie Power - sibling. Nickname: "Bone Head" (Power Pack #25)
* Katie Power - sibling. Nickname: "Dingbat" (Power Pack #4)
* Leech - they become friends in the Alley when Power Pack were captured (X-Men #195), and they also save him from the Mutant Massacre (PP #27)
* Mad Thinker - *Enemy*: they battle in the big dinosaur exhibit in the city of Stamford (Power Pack #54)
* Meggan - Excalibur attempted to liberate Power Pack from Nightmare (Excalibur #29)
* Nightcrawler - they have allied early on, and later Excalibur attempted to liberate Power Pack from Nightmare (Excalibur #29)
* Nightmare - *Enemy:* he held Power Pack captive in Excalibur #29
* Quicksilver - they fight in Central Park as Quicksilver kidnaps Franklin Richards (X-Factor An. #2)
* Rachel Summers - X-Men and Power Pack are friends (e.g. X-Men #195), later Excalibur attempted to liberate Power Pack from Nightmare (Excalibur #29)
* Reed Richards - the Power Pack kids discuss the Fantastic Four at home (PP #5), Franklin also tells them about his parents, and later they meet because Jack and Franklin spend time together (Power Pack #54)
* Rogue - X-Men and Power Pack are friends (e.g. X-Men #195)
* Sabretooth - *Enemy:* they battle during the Mutant Massacre (Power Pack #27)
* Shadowcat - X-Men and Power Pack are friends (e.g. X-Men #195)
* Spider-Man - the kids first talk of Spider-Man at home (Power Pack #5), then become allies (#6)
* Susan Richards - the Power Pack kids discuss the Fantastic Four at home (PP #5), Franklin also tells them about his parents, and later they meet because Jack and Franklin spend time together (Power Pack #54)
* The Thing - the Power Pack kids discuss the Fantastic Four at home (PP #5)
* Thor - The Warriors Three talk of Thor after they have met in Central Park (Power Pack #15)
* Volstagg - Power Pack and Warriors 3 combine forces to defeat Bogeyman in Central Park (PP #15)
* Wolverine - X-Men and Power Pack are friends (e.g. X-Men #195)