Sarah JTennyson/Sarah Tennyson Gold aka Alien Phantom

Buggy Gold aka Captain Buggy D Gold

Arthur Fleck Gold aka Joker

Harleen Quinnzel aka Harley Quinn (Margot Robbie)

Jack White aka The Joker (Heath Ledger)

Harleen Quinn (Lady Gaga)

Arlong

SCP-079 (the Old Computer)

Faith Fleck Gold aka Punchline

Arthur Jr Gold aka Joker Jr

Hope Fleck Gold

Gary

Sophie Dumond

Gigi Dumond

Gary Jr Dumond

Mr Gold aka Rumpelstilskin

Meg Griffin Gold

Caleb Tennyson aka the Spark

Catherine Tennyson aka Elastic Woman

Stephanie Wenlock aka the Vocals

Ben Wenlock aka Ben 10

Z Wenlock

Bo Wenlock

Doodlebob

Killer Croc

Bruce Wayne aka Batman

Selina Wayne aka Catwoman

Dick Grayson aka Nightwing

Barbara Gordon aka Batgirl

Damian Wayne aka Robin

Luffy (Wayne, he is adopted)

SpongeBob SquarePants aka the Quickster Sponge

Patrick Star aka Starfishman

Chowder aka Super Animal Boy

Slenderman

Death (from Family Guy)

Ben and Lou the Hyenas

Here's a little photo I found which is like Alien and Harley's friendship

Theme- THE DEATH OF PEACE OF MIND-Bad Omens

[There should be a GIF or video here. Update the app now to see it.]