Alloy (Alloy)-Mason's Bubble Blast
Pico (Pico)-Meat Boy, Guppy's Quest, IGB, Project Nexus 2
P-Bot (Newgrounds)-Meat Boy
Salad Fingers (Salad Fingers)-IGB Guppy's Quest
Alien Hominid (Alien Hominid)-Castle Crashers, Meat Boy, Battle Block Theater, Dino Run
Hank (Madness)-[Blockhead, Pico, P-Bot, Dad (Dad n Me), Tankmen, Egoraptor, Hellbenders, Stamper appear in PN2. Luis, AfroNinja, Ricepirate, and Tom Fulp also appear.
Fancy Pants (Fancy Pants Adventures)-[Fancy Pants Man appears as a playable character in SHIFT 3.
NG Gold Sword (Newgrounds)-Castle Crashers