Spongy isn't very popular with most contestants as he's often referred to as smelly, fat, or dead weight. Spongy himself is actually kind, sensitive, and harmless.
In "Half a Loaf Is Better Than None", when Spongy rejoins, he complains that his name isn't on the scoreboard. The Announcer tells him that since rejoined the game with 38 loaves in his basket, his score is 38.
In "The Reveal", Spongy seem to have no problem with the Announcer pointing out his extreme fatness. Spongy moans in pain when the Announcer throws a knife at him.
In "The Glistening", when the Announcer asks who wants to go back to earth, Spongy raises his foot.
In "Don't Pierce My Flesh", Spongy accidentally kills the Announcer when he falls and crushes him.
In "Return of the Hang Glider", Spongy screams when the Announcer reveals that he sold Dream Island.
In "Getting Teardrop to Talk", Barf Bag asks if Spongy will take her seriously, since no one else will. Spongy enthusiastically says that he will, and later on they become teammates. Later, Barf Bag and Bracelety use Spongy as a trampoline in order to get the basket to X.
In "Why Would You Do This on a Swingset", Barf Bag hops into Spongy's mouth and uses her vomit to propel her team's swing in circles.
In "What Do You Think of Roleplay?", after their team loses, Spongy gets upset that nobody noticed that he was gone. He questions if they even know anything about him, and Barf Bag tries to tell him that they do, but he tells her that they don't.
In "Return of the Rocket Ship", the two are seen in a pool with multiple paper planes that Spongy attempted to sail. Barf Bag suggests that they call it day for a number of reasons and Spongy irritably responds that she just doesn't think he can do it. After being pulled out of the pool and Barf Bag and Taco finish talking, Barf Bag suggests they play a game of table tennis, Spongy replies that he'd rather play ping-pong.
Status: Enemies, on her side
In "Barriers and Pitfalls", Pin orders Spongy to help Pen and Eraser find Blocky, Spongy does so.
In "Insectophobe's Nightmare 2", as a part of Blocky's Funny Doings International, Blocky recommends that the viewer place the Announcer recovery center next to a trampoline, throw Spongy onto the trampoline, and kill the announcer, causing him to be squashed by Spongy endlessly.
In "Getting Teardrop to Talk", Spongy says that Firey Jr and Bomby can both join his team.
In "This Episode Is About Basketball", Spongy gets mad at Gelatin when he almost suggests that they blow up Bomby.
In "Get Digging", they run away from Evil Leafy together with Book even saving Spongy from falling into the evil canyon.
While they haven't interacted directly, Spongy was used as a trampoline by Bracelety and Barf Bag in order to get the basket down and back to X.
In "Barriers and Pitfalls", Bubble throws Spongy over the rock wall since he was on her team.
In "Gardening Hero", Bubble can be seen standing on Spongy when they are pulled up into space.
In "Don't Pierce My Flesh", when Bubble asks what they will do without the Speaker Box, Spongy says he doesn't know.
In "Hurtful!", when Bubble finds a letter, Spongy asks what it says.
Status: Minor Enemies
In "No More Snow!", Spongy tries to warn Coiny about the canyon, but W.O.A.H. Bunch ends up stuck on top of the spikes beneath Evil Canyon. Coiny asks Spongy to save them, however Spongy refuses. Coiny jokes that he can't hear him under all the layers of fat, and kicks him down into the spikes so the team can land to safety.
In "It's a Monster", Coiny does not apologize to Spongy once he was revived, even though Spongy told him to.
In "Why Would You Do This on a Swingset", Spongy is inspired by Donut's speech.
In "Insectophobe's Nightmare 3", Evil Leafy came out of Spongy's mouth and Spongy laughed, so it's likely that Spongy doesn't see her as an enemy. Though he does smile when Gelatin freezes Evil Leafy and writes "First" on her back.
In "Gardening Hero", Firey and Leafy try to shoot Spongy with lasers from their ship, Spongy successfully manages to dodge their shots.
In "Hurtful!", when to many Speaker Box clones appear, Firey says to just get to the elimination, Spongy agrees.
In "Return of the Hang Glider", Spongy is allowed unto the island by Firey.
Status: Good terms
In "What Do You Think of Roleplay?", after the challenge, Spongy was upset over his team not recognizing that Tree was imposing as him. After thinking that his team knows nothing about him, he hists out some of his hobbies, including sailing airplanes. Firey Jr. tells him that he can't sail airplanes.
Status: Possible bad terms
Firey Speaker Box
In "Don't Pierce My Flesh", when Spongy crushes his house and cries, the Firey Speaker Box tells him they have a lot more houses. When Firey Speaker Box asks which contestants would like to escape the volcano, Spongy raises his foot.
In "Hurtful!", the Firey Speaker Box forces the metal contestants into an incinerator.
Status: Minor enemies
In "Insectophobe's Nightmare 3", Spongy seemed happy when Gelatin froze Evil Leafy and wrote "First" on her back.
In "It's a Monster", Spongy frowns when Gelatin throws freeze juice at him.
In "Why Would You Do This on a Swingset", part of Team Ice Cube's transformation involves Gelatin attaching himself to the back of the swing and Spongy's head.
In "Fortunate Ben", Spongy is happy that Gelatin threw away Bracelety's notes about Ice Cube.
In "This Episode is About Basketball", Spongy glares at Gelatin when he suggests using Bomby to win the challenge.
They are at least on better terms in BFDIA as Golf Ball valued Spongy as a teammate in "Get Digging", and Spongy always listened to her strategies before switching to W.O.A.H. Bunch in "Get in the Van".
In "Gardening Hero", Ice Cube can be seen standing on Spongy when they are pulled up into space.
In "Get Digging", they run away from Evil Leafy with Book.
In "Vomitaco", Leafy congratulated Spongy for making a taco that 8/10 eliminated contestants liked.
In "Reveal Novum", Spongy voted for Leafy to be eliminated because of her arms.
In "Gardening Hero", Firey and Leafy try to shoot Spongy with lasers from their ships, Spongy successfully manages to dodge their shots and shoots Leafy.
In "The Glistening", Leafy gave her immunity to Spongy, as she feels sad for burning him earlier, Spongy responds with a happy "Yay!".
In "Return of the Hang Glider", Spongy voted for Leafy to win Dream Island. Spongy randomly disappeared later on, so it's unknown if he hates Leafy or not.
In "What Do You Think of Roleplay?", Spongy took the form of Lightning and was iance's impostor. Due to Lightning being able to fly, Spongy now had this ability and was overjoyed with it, flying around happily through iance's team room. However, since Lightning always forgets to fly, Fanny correctly accused Spongy of being the fake due to him flying.
- Main article: Match, Pencil, and Spongy
Status: Friends (As of BFB 5)
In "The Long-lost Yoyle City", when the FreeSmart Supervan's magnet starts to attract Needle, Spongy grabs unto her, along with the rest of the team.
In "It's a Monster", when Spongy tries to get Coiny to apologize to him for killing him, Nickel tells him to zip it.
In "The Liar Ball You Don't Want", Nickel face plants into Spongy when playing with poppers at the beginning.
- Main article: Match, Pencil, and Spongy
Status: Major Enemies
In "Barriers and Pitfalls", Pin ordered Spongy to go help Pen and Eraser find Blocky, who was 'eaten' by the fish in the last episode. Spongy agrees without arguing.
In "The Glistening", she voted for him to be eliminated.
In "Get Digging", Spongy backs away when Pin asks if anyone wants to switch.
In "Get in the Van", Spongy jumps over a knife, thrown by Pin, that was meant to kill Leafy.
In "No More Snow!", Pin told Spongy nobody cares about him dying.
In "The Long-lost Yoyle City", Pin made Spongy carry the large bag of money since he's the only one who can. When Pin asks if anyone can throw far, Spongy says he can, but when she asks him to throw a stick 2,763 miles, he tells her that he was kidding.
Spongy and Rocky are shown to be friends.
In "The Reveal", they pair up in the Frisbee contest and place second, gaining 100 points each.
In "Reveal Novum", they both voted Leafy out.
Spike Ball Speaker Box
Team Ice Cube
In "What Do You Think of Roleplay?", Spongy is upset with his team for not noticing that he was the impostor of their team and proceeds to list things that he likes to do since he thinks they don't know anything about him.
Spongy tends to get thrown and pushed around by other characters when they are in times of peril or desperation.
In "Don't Pierce My Flesh", Spongy spends the entire challenge falling into the magma, so the other contestants just walk on him as he falls in.