Mysterious Alien Creature

First appearance: Mac and Me (1988)

Alien family gets trapped on earth, the youngest of them gets separated from the family, befriends an handicapped youth, becomes addicted to Coca-cola, has wild adventures.

Beach Ball with Claws

First appearance: Dark Star (1974)

Follow the mission of the crew of the planetary demolition space ship Dark Star.
John Carpenter's first feature film written by Dan O'Bannon (who also stars).
If it wasn't for this movie we wouldn't have Alien, Red Dwarf, or that cool stretchy star field thing we see in Star Wars when they activate their Hyper Drives.

The Pink Bandage Man

First appearance: Timecrimes (2007)

When Hector decides to waste time looking into the woods behind his new home instead of helping his wife with some errands he happens to notice a topless lady. Upon entering the woods to see more of the lady he is set upon by and terrifying man who is armed with a pair of scissors and a face covered in strange pink bandages. Hector escapes the pink bandaged man by hiding in a seemingly abandoned building at the top of a hill. But is he safe there?

Timecrimes is probably the best time travel movie I've ever seen not involving Ted Theodore Logan or Bill S. Preston Esquire.

Skeletron

First appearance: TurboKid (2015)

The heartwarming tale of a post apocalyptic friendship between a post apocalyptic boy and an extremely friendly post apocalyptic girl. Filled with blood, laughter, blood, horror, arm-wrestling, hideous secrets, refreshing water, blood, BMX bikes, fights, robots, blood and blood.

Phobe

First appearance: Phobe: The Xenophobic Experiments

Ultimate Fighting Soldier Sgt. Greg Dapp is assigned with capturing the last of the deadly creatures known as Phobes, the only problem is this one has escaped to a terrifying alien planet known as EARTH! Can Dapp find the creature in time? Will he be able to stop the creature's egg from hatching and unleashing even more Phobes on the un suspecting inhabitants of this primitive planet?
You will believe an alien cop can dance with a human high school student!
Produced in Niagara by a small band of rebel film makers.