Sonic Shipping, Logically Speaking; KnucklesXJulie-Su
I could have sworn I made an entry for this couple before, but whatevs.
Characters involved: Knuckles the Echidna and Julie-Su the Echidna.
Most well known nickname: Knuxsu. Or Knux-Su.
Original date of ship: 1997, with Julie-Su's debut (in-universe as well as out)
Analysis of chemistry (aka why people do/don’t ship it): It was always in Ken's plans to make Julie-Su and Knuckles an item. The soultouch which made them soulmates forever and ever was introduced in the very issue she debuted in, she's been involved in a good chunk of the adventures Knuckles has been on (although that was true of Ian and Karl's runs too), they've been steady boyfriend and girlfriend for a few years now and there's the fact that they're together in the future (which is one of the stipulations Penders has for the use of his characters...I'll cover that later).
As for the actual chemistry? Well, they're sort of an example of being very similar in personality. They're both good fighters, both dealing with family issues (or supposed to be; see below), both temperamental (although Julie-Su is less so) and both empathise with the situation that they had been placed in. Had.
As for reasons against? Just keep reading.
Personal Opinion: FUCKING SOULTOUCH.
I hate this couple. It is without a doubt my least favourite Sonic couple in any medium, and I don't have any investment in Knuckles' character whatsoever. The circumstances to get them to start bonding are contrived as hell, the interaction between her and him to make sure that they became an item came at the expense of the rest of the Knuckles cast, Julie-Su's character relies on Knuckles in a way even the most avid Sally haters cannot say Sally does with Sonic. Her traumas are treated as unimportant footnotes while she spends her time comforting Knuckles, and there's the fact that one of my other most hated characters for how glorified she is (Lara-Su) forces the couple to have to be in the future as well. It is just so infuriating.
One point for it though; it is set in stone time and again that they do not want to marry at all and instead feel confident enough in their relationship to stay committed without a ceremony. Call it tacky if you want, but it's not done that often in fiction, and I have an aunt who went that same route so I have close-hand experience with a couple like that.
Likelihood in the games: Prior to #244; As much as I hate it, it is the defacto couple in the Archie comics. Not only are they very much in the 'will they' part of 'will they won't they', they're as supportive of each other than ever.
But talking about the games? No chance. Not just because Julie-Su isn't in the games, but any niche she could have filled is taken by Shade since she's pretty much an expy. And I've already explained how she won't appear again.
Post-#244/252 (maybe); ...Geebus. Even if I do hate it the most, I wouldn't have wished this on it. It has gotten truly, royally screwed where it hurts the most. Because of Penders coming in, taking his characters and then trying to dictate to Archie and SEGA what they can and can't do on their own property, it looks like Julie-Su and Knuckles can never, ever interact again. And the second Genesis wave has the possibility of removing her from his memories. Just...ouch.
The worst thing is that Julie-Su never got a chance to be her own person, so I'll always see her as that one person who was made to be Knuckles' arm candy and never anything more.