User blog comment:The Puppeteer King/Dungeons, Dungeons and More Dungeons "unlikely friend"/@comment-27159736-20150802151329/@comment-27159736-20150802154430

I guess we'll see in the episode when someone says "unlikely" it rules out established friends so Pacificas out naturally since she became friends with him, Robbie would never be involved with kids, Wendy has the least amount of appearances and would be obvious, Candy and Grenda are Mabels friends and only join him if Mabel invites him to join them or requires their help in helping Dipper, Gideon still hates the pines so he is definitely out, Mabel and Stan are too obvious so it only leaves ford like you said. Your comment made me realise that and I only mentioned Pacifica is it could be a continuity or trivia reference not a direct appearance due to their similar facial expression in said scenes.