Board Thread:Fun and Games/@comment-27276934-20151215003135/@comment-4991168-20160308154458

In (rapidly) decreasing order of seriousness.

Sans x Toriel. It just fits. They became good enough friends to honor promises to one another in the extreme without ever even properly seeing each other.

Undyne x Papyrus x Alphys - Undyne and Alphys are official and seem destined to be together, but out of the listed NPCs it feels like Papyrus is the other party with the greatest potential to be romantically connected with Undyne, and she's the only one I could see being with him. I feel like it doesn't fit nearly as well as Sans x Toriel.

Frisk x Temmie. Frisk is allergic to Temmies who find Frisk impossibly cute. This preserves the "relationship won't happen" theme of Frisk attempting to 'date' in Undertale, but reverses the theme by making the other party the one actually interested.

Frisk x Monster Kid. For coexistence. Close in age, too.

Dogamy x Dogaressa. It is, apparently, canon.

Burgerpants x Harem Route. The most badass character deserves it.

Flowey x Soil. The most perverted and physical of the relationships, Flowey constantly absorbs fluids from the soil no matter what they contain or where they make come from. His inability to connect to others emotionally doesn't extend to the soil, which he seems positively rooted in, and short of extreme circumstances soil will definitely be around for at least as long as Flowey is.