Various ships and in alphabetic order too:-
Gender order is Male x Female
Alakazam x Gardevoir: More because it's funny/awesome/romantic/plotty when rivalled with the below Gardevoir ship. Though I guess real justification is they're the two most powerful(ignoring male Kirlia evo, since he's physical) Special non legendary Psychic humanoids. And the oppurtunity to call Alakazam a 'spoony bard' is too much to resist. The spoony bard that he is.
Arcanine x Absol: Yeah, yeah, weird, I know. I have very little justifictaion except they're both what could be considered almost pseudo-legendary Pokemon. And polar opposites in effect, as Arcanine carries a great positive legacy, whereas Absol is nigh on infamous. I kinda see it as Arcanine protecting Absol from those who would seek to harm it, even making them reconsider prejudice against it. In effect, it's just very sweet I think.
Blaziken x Gardevoir: Fallen angel x angel is how I see it. Blaziken, a Fire/Fighting type with a daemonic appearance, and it's head crest resembles stunted wings. Gardevoir is basically a guardian angel, I see the chest and back horns as symbolising virginity/purity, something commonly placed with angels, and heck, it's Psychic type, a type that is often linked to heavenly qualities(look at Mew...). It's fun to work with, funny as hell to write about, and one of my favourite pairings. Plus in rivalry with above ship, Blaziken gets to call Alakazam a spoony bard. Which he very much is. That spoony bard.
I am addicted to calling Alakazam 'spoony bard' now. Dangit.
Houndoom x Manectric: In RS, they're a good breeding couple, for (the now useless) Crunch Manectric, and they're one of few really 'wolfish' Pokemon of about the same size. Plus, I dunno, I just kinda like it. They're colours are very contrasting as well, which, in my eyes, makes it look nice as well. I have an odd liking for contrasting colours.
Lucario x Mimiroppu: Because, well I can. Barely justified, except by the fact that dogs chase rabbits, and in effect, they are humanoid versions of those two creatures, so it comes under a similar thought process to Menctric x Delcatty, below.
Manectric x Delcatty: Seeing them used by a Young Couple in Pokemon R/S/E made me think about this one. It's kinda funny, in that it's basically dog x cat, the eternal rivals of basic ideaology falling in love. I honestly can't come up with an real justification, I just think it's almost sort of sweet.
Megayanma x Vibrava: Note I didn't say Flygon. This is because I can't really find myself pairing Flygon with anything other than Flygon. However, I kinda like Megayanma x Vibrava. They're both dragonflies, both pretty draconic, and both(if my assumption that dragon Pokemon are ancient species is considered) are relatively old species. I see it as more nice than anything, with the Vibrava longing to fly like the Megayanma, but only being able to hover, and the Megayanma encouraging Vibrava on.
Sukapuu/Sukatanku x Nyaruma/Bunyatto: It's Pepe La Pew all over again folks. If you have ever watched Looney Tunes, you'll get this.
Yanma x Vibrava: Basically the same as Megayanma x Vibrava, but with them both dreaming of evolution.
Pair Up: Shadowfaith, mess with her, mess with me.
Old Name: Shiny Flygon
Evidently, I'm back.