One of my players is a Summoner who is using picture #3 as his dragon eidolon. Little guy is like if a bulldog was also a portal to the Astral plane obsessed with collecting junk. His breath weapon is splinters.
I have dubed this a "Tea Cup Dragon" much like the Tea Cup Pigs in a way.
I am gonna find a way to introduce one of these to my campaign / party somehow!