I'd like to hear about canon!Phoenix interacting with the Avatar setting!Phoenix. A couple of dads.
Oh that's a fun combo! I mean, on the one hand we have Avatar!Phoenix, who acquired Trucy when she was two, grew up with Miles, has fire powers, and is some enthusiastic combination between a jock and a theater kid. On the other hand, we have Phoenix, our well-beloved human disaster.
There will be at least one scene where canon!Phoenix leans with his head against the wall and wonder how his alternate self has his life so incredibly together when he himself feels like such a mess. Also, he's kinda ripped from all the martial arts? Feeling of inadequacy, thy name is Phoenix Wright. (pats him on the shoulder)
Meanwhile, Avatar!Phoenix is going, "Wait, you can read? You can write? You went to fancy people school and got an education?!? 8O 8O 8O" Because he's from a time where illiteracy is the norm and it's considered super impressive and high-tiered education for their social class that Miles can read and write. Seeing Phoenix just casually jot some notes down? Seeing him get into an argument in court? Amazing, his counterpart is so smart! He's not allowed to meet Avatar!Phoenix's boyfriend, Miles is into intelligence, how is Phoenix supposed to compete with a version of himself that's so incredibly smart and has such stylishly pointy hair??? (Avatar!Phoenix doesn't use gel or anything similar, so he's got constant bedhead, people look at him, look at canon!Phoenix, and go "Is that why gel?" "Yes, that is why gel.")
Aside from the bits of each other that make them feel inadequate about themselves, however, they get along really well. They talk about their favorite types of noodles and snicker over the fact that Steel Samurai exists in both their worlds somehow (and over the fact that both their boyfriends adore it) and their wonderful daughters who they love so much.
Putting canon!Phoenix in Avatar-setting clothes would have him going, "Hm, more sashes and ties than I'm used to, but pretty comfy!" Putting Avatar!Phoenix in a suit and dress shoes who be exactly like those pictures of dogs miserably wearing shoes. Canon!Phoenix could pass as a foreigner trying out the local fashion and not quite used to it if he went to the Avatar setting. Avatar!Phoenix looks nothing but miserable and awkward in a suit, he would like out now, please, free him.
Also, canon!Trucy would insist on spending some time with Avatar!Phoenix just for the sake of seeing what tricks he can do with his fire, and also because he can produce his own pyrotechnics and she wants to come up with some tricks he can do. Contrary to the expectations of most, canon!Phoenix 100% nopes out of this interaction - not only is he completely secure in his dad status, he doesn't want to deal with Trucy trying to rope him into being her beautiful assistant again, she's already going to try to get him to be part of her show again as a result of all this, he just knows it, but he's still going to try and avoid that situation for as long as possible. ;)