Below is a list of characters whose reality does not have an official designation and we do not feel the reality is defined enough to assign a TRN to. NOTE: The list may also include characters whose home reality is totally unknown - they are only shown outside their reality with no indication of where they are from.
Falcon was a member of Superior Avengers, a version of the Avengers ran by Spider-Man who treated it like a military unit and as his personal Avengers. He like all the other members of the team donned new Spider-Man themed costumes and obtained a pair of Web-Shooters.
The Fantastic Fur were combatants in the first Secret Roar. Dissatisfied with the war they had created, the supervising celestial destroyed their battlerealm and all its inhabitants, including Fantastic Fur.
Flash Thompson who had gotten into a bar fight and left him with a black eye, he met Peter Parker lamented he had never been in one and that night as Spider-Men met Doctor Octopus and after a short scarp, invited him for a beer. At the bar Peter poured his beer over Doc Ock and a bar fight between the two ensued. He received a black eye and later met with Flash who congratulated him on getting in a fight 
Sue Storm gave birth to her and Reed Richards' second child, Valeria. Franklin visited his mother after she gave birth. 
Note: On Earth-616, Valeria was initially stillborn, this reality was where that never happened.