Sharp Point appears to be going insane.

Babidi, a space wizard, is travelling throughout space in order to resurrect Majin Buu, from a planet he had planted him in centuries ago. And then there's Equestria, a happy(?) world of magical equines.

I live to kill, and I kill to live. Transportation to another realm won't stop me. I like hurting others.

Bert the berd sleeps for too long, and misses the migration southward! He attempts to migrate, on his own, but ends up in Ponyville. Good job.

An insane human makes his way to Ponyville through unknown means.

Oscar Cool is your average, badass poni with op powers that decides to go on an adventure!

Lt. Smallballs had Kushy The Drug Man cornered, but then Kushy smokes some teleportation weed and Lt. Smallballs follows him by smoking the same weed and they end up in Equestria, surprise surprise!

When Spike falls over a small pebble and finds a hidden tribe of changelings stuff happens.

RED Soldier from TF2 gets teleported to Equestria to help win a war.

When Twilight is looking for old stuff in her library, she finds a certain board game that everypony loves! Right?