did i ever write the meta about thymeo's aegislash ... if i did then ok this is a recap, and if i didn't, then this isn't a recap and it's just info.
thyméo met his partner pokemon when he was 10, playing a game of knights and dragons with friends, he managed to grab onto a honedge ⎛ by accident! ⎠ which latched onto his arm, and is the reason his right arm is no longer the dominant arm ⎛ there's some nerve damage! ⎠ per the dex entry for honedge:
Apparently Honedge was born when a departed spirit began inhabiting an ancient sword. It attaches itself to people and drinks their life force.
the spirit in the sword is an oathbreaker paladin named thibaud, who happens to be the dark bakura to thyméo. his past incarnation, thibaud died on the battlefield- spitting curses at the world as his blood stained his own blade ⎛ honedge is shiny! ⎠ , the vengeful soul latched onto the bloodied blade and followed the honedge creation path.
since thibaud is just 'thyméo in the past but if he also had no coping skills', instead of draining thymeo's life force, thibaud formed a link between the blade and thyméo.
unlike most of the honedge evolution line, the evolution from doublade to aegislash was spontaneous- usually it takes a dusk stone, but doublade will evolve on its own if it senses the 'soul of a king' in its trainer, and thyméo may not be a king's bloodline, but he's the blood of the holy maiden of kalos, which counts!
due to his unique bond with his pokemon, when aegislash ⎛ thibaud ⎠ takes damage, thyméo ALSO takes damage. he has finished battles hiding bruises forming, and very few people are aware of how the bond between him and his ace pokemon actually works.
the other fun fact is that thibaud can do a little switcheroo and throw thyméo into the body of the aegislash and then wander around using thymeo's body himself.
the two are never apart ... because they sorta CAN'T be ...