Here are all the 53 recommended characters that appeared in BFB 4.
Everyone mostly looks disappointed or angry as they're all mostly mad at Pen for making the worst Four drawing ever.
This was also the first episode starring recommended characters recommended from Patreon.
Beany; paperpaws, lolipope
Blood Juice; doctorollie; also nicknamed as BJ, young form can be seen in a fan-made BFB intro
Censor Bar Dog; kittydog, who is a popular animator on YouTube.
Dollar Bill aka "the dollar i donated" (Diamondcup67); JumboDS64, Diamondcup67
Epic Guy; WhoIsThisGuy; looks similar to Infinite from Sonic Forces.
First Aid Kit; Jagger J.C.
Golf Ball Speaker Box; Angry 315
Hot Cheese Puff; WakelessLon; A Youtuber known for his BFB effect videos!
Jordan A. & David A.; Jordan L. A.; alock with "J.A.&.D.A." written on the side/A YouTube Channel
Little Boy; The Demented Bros (The D.B.)
Pandora Book; MiggsKirby888; Looks like Pandora from Kid Icarus: Uprising, but doesn't seem to be a reference
PDA (Personal digital assistant); lyxon
Piece of String; Louise K.
Robot Tree; Leo Y.; also appeared in BFB 6
Science Book; Arekz; originates from Random Object Battle Royale Island, recommended by the creator of that series
Soldery; Amor B; confirmed male by his recommender via Twitter
Sponeg The Sensei; Sponeg t. S.
Symbol; Nathan P.; the only BFB 4 RC to smile.
Water Bottle; PhantOmInfinity
X the Arcade Machine; Just A. D. M.
Winner; Get W.; Main article: Winner
Censor Bar Dog was recommended by kittydog, a popular member of the animation meme community.
After BFB 4, Bracelety
is no longer in the Recommend a Character section. Swappy was in it from BFB 5-6. As of BFB 7, they have been replaced with PDA.
PDA is currently on the Patreon as the "Recommend a Character!" icon, replacing Swappy.