For ppl readin other posts who want to find the characters that vanish after 5-15 seconds, I'm making a list stating what realm they're found in, wherew in that realm, & what time/date they appear.
Meat:E-8 Netherrealm (In cave with skeleton on the ground: Around 10:00 am)
Motaro:Earthrealm (Hut next to kid who want you to prank old man; at 10:00 am) (Don't know coordinates)
The best way, in my mind, to find them is to meditate for at least 2 days. So the first time you see them make note of what time they appeared so you'll know when to stop meditating.
*Meat & Motaro are the only 2 I've found so far. I will update this thread if I find any more.