Zenia the growlithe is my buddy atm, I plan on evolving her before switching since I really want a arcanine.
When I saw the Catcher go up, I wanted to wait until I saw something stand out to me that I thought I might enjoy. Based on what was set in people's avatars, that wasn't a whole lot. Then I saw a "Horsea" in someone's avatar (I think it was Hopper?) and I thought it looked nice - and the blue goes well. Plus, there is the legend in Japanese folklore that connects seahorses with dragons and longevity, so it's a perfect fit. So as of this post, I have Horsea set as my Buddy. It looks like a real go-getter, and hopefully an erstwhile companion I'll have for a while. (Still hasn't evolved yet, so this could take some time!)
I evolved Abra to Kadabra so I'm going to focus on leveling some other mons until I want to train it to an Alakazam. Right now Magikarp is my buddy because I want a Gyarados (in spirit of Tsunami, the Gyarados that I'm known to use in battles ehehe)
Given how the post directly above yours indicated that Marine has evolved Vulpix more than once, I would assume it is possible.
Mine is Arpit (Vulpix). I named it Arpit 'cause I love this name so so much! It's a hindi name (generally used for boys) which means 'to donate'.
Since I evolved Magikarp to Gyarados, now my buddy is a legendary egg. Can't wait to see what legendary Pokémon it hatches into!
Still sticking with this Magnemite for right now. I want to see if I can go for the species that nobody's working on, to increase the cataloguing of the Evo-Dex. Of course everyone's going to go for the Eggs, but there's no challenge there because you know they'll all evolve at Level 40 anyway. And besides, that would take a very long time. So for now I'll just start cherry-picking the 'less popular' species.
Though I was trying to level up my Vulpix Fyra, right now, I reeeaaally want to see what legendary could be inside the egg. Even if it may take me ages to do. ^^'