During a Chaos Control mishap, Mario, Sonic, Shadow, and Luigi find themselves in the land of Equestria! To make things worse, Metal Sonic and The Koopa Bros. have been sucked up by the teleport as well. Now, with four Chaos Emeralds in Equestria, will our heroes be able to reclaim them, or will Metal Sonic collect them once more, this time making sure that Mario and Crew stay dead? Find out in Super Equestrian Bros. Z!

Pre-Read by BraveHeartBrony

Something is wrong in Ponyville... Fresh baked sweets from Sugarcube Corner are disappearing, and throat quenching beverages from Berry Punch's Punch Emporium are being stolen as well, and to make it worse Apple and Apple related foods and drinks are being taken hostage by the mysterious force! What attacked all these places and why? It's up to everyone's favorite Crusaders to find out!

The prompt I picked was "Mysterious creatures are attacking Ponyville." I decided to make it less serious and action packed and more funny and kid friendly. Hopefully this fits the prompt.
(Putting in Alternate Universe just for being safe.)

Spike is older, not a very exiting life, plays the bass guitar in his band, and is dating a filly. But when a female dragon comes to ponyville, Spike will soon see what he wants most.

Graros the Wizard and Adoian Swordhand were sent to eliminate the Dark Lord Drake and his commander Sharpfang to stop their rain of terror, but when a portal to hell is accidentally opened by Graros and Drake the four are sent to Equestria instead. Why and how did the spell misfire? How will our heroes stop Lord Drake now? Only time will tell!

The year is 4000X, and a brilliant mind known as Dr. Celestia creates six robotic mares in the hopes of creating peace and harmony until a sinister mind known as Dr. Discord takes the mares and uses them to create chaos around the globe. Dr. Celestia creates one more mare in the hopes she can stop the evil doctor and stop her mares gone rogue. She named her Mega Mare.