These are the contestants that are recommended characters as a duo. They are all recommended characters with two characters getting shipped as a "romantic" couple, or put as friends or enemies.
BFDI Couples is a recommended character that appeared in "The Glistening". They are made of only Coiny and Needle with the words "And some others" floating next to them. Likely referring to other BFDI ships that weren't included as part of the recommendation.
Coiny and Firey as BFFS
Coiny and Firey are shown to be arch-enemies in BFDI and to some extent in BFDIA and BFB, though their interactions in BFB resemble more of a frenemy relationship.
Giant Needle vs. Giant Blocky
Leafy And Firey As A Couple
Leafy And Firey As A Couple is a character recommended by MrDoubleGAngster. They are shown in "Hurtful!".
Firey and Leafy is one of the most well-known friendships of BFDI, with the ship being known as "Fireafy".
Match And Firey As A Couple
Match And Firey As A Couple is a character recommended by bobbo44445 and paviedairin.
Match and Firey were shown to be good friends in the Firey comics and early BFDI. However, in later episodes and BFB, they did not interact.
Match and Pencil as Enemies
Match and Pencil as Enemies is a character recommended by MrDoubleGAngster.
This duo is an unlikely one, since Pencil and Match were always shown to be friends, with practically zero conflict.
Needle and Coiny in Love
Needle and Coiny in Love are recommended characters who appeared in "Hurtful!". They were recommended by icedude321. They are Needle and Coiny holding each other's hands and have a pink heart sign on top. Coiny and Needle have also shown interaction outside this recommended character. This duo was most likely created because of an event in "Take the Plunge: Part 2" Where Blocky claimed Needle is in love with Snowball, but she ends up saying she likes Coiny more, which surprises everyone.
Robot Rocky and Robot Flower
This is a strange duo since Flower and Rocky never interacted themselves.
SB and GB as BFFs
SB and GB as BFFs is a recommended character from "Insectophobe's Nightmare 2". It was eaten by bugs along with most of the other recommended characters in the episode. It is a badly-drawn Snowball and Golf Ball smiling at each other. It was recommended by MrTristan626.
This is another unlikely duo, since Snowball and Golf Ball hate each other.
- Strangely, Golf Ball's eye(s) are missing, but not in the .flas.
- A version including Golf Ball's eyes can be seen seen in Carykh's BFDI Recommended Characters video.