Another "Secret mission" is planned, and Captain Steelwing's one goal is to protect the Princess protege and avoid getting killed, so he plots ways to get out of it, but his schemes always land him back in the to his previous mission. Steelwing is joined by his batman Private Baldrick (Earth Pony) and idealistic twit Lieutenant Bright "Sky" Skies (Pegasus Pony). General Melchett rallies his troops from Canterlot, a thirty-five miles from Ponyville, where he is aided and abetted by his assistant, Captain Shoeshine, pencil-pusher supreme and Steelwing's nemesis.

In the last desperate act, the sector V of the Kids next door fired the moonbase against Grandfather. But something unexpected happened, a giant portal was opened in the lab wing of the moonbase which sucks everything around it, grandfather included and got thrown into the world of equestria.

kinda lame description, but if you can help me with it. just send me a message.