In The Search for Utamu, Pumbaa and Timon found Bunga when he was really little. Pumbaa wanted to keep him, but Timon says that they already raised Simba. After Bunga got the rarest grub in the Pride Lands called utamu, they decided to keep him. Pumbaa really cares for Bunga. At first he didn't want Bunga to be part of the Lion Guard until Kion says that Bunga was the bravest animal he knows.
Timon is the best friend of Pumbaa since Simba ran away from the Pride Lands. Pumbaa helps Simba defeat his evil uncle Scar by using bait dresses and drag and do the hula to distract the Hyenas. To this day, they remain best friends.
Timon hates it when Simba is hurt or in danger, as seen when he is lost and later is stung by Sumu, showing how much he loves Simba.
Nala and Pumbaa are good friends. After finding out that Bunga wants to put on a Christmas show to make Dandy Claws comes, just like her daughter Kiara, Nala wanted to be in the performance. She made Simba to it do, since Timon and Pumbaa did so much for him.
Rafiki and Pumbaa are good friends. When Bunga was bitten by a snake they asked Rafiki for help but he wasn't going to do anything. He said that Bunga was immune to snake bites. Rafiki is also standing right next to him and Timon as they cheer for Kion's wedding.
Fuli was first annoyed at Pumbaa because they were touching her fur. Fuli doesn't like her fur to be touched. In Bunga the Wise the guard wanted to talk to Bunga, but Pumbaa and Timon kept on getting in the way.
At first, Ma Tembo was a little annoyed at Timon and Pumbaa, since she never asked for their help with the Ukumbusho performance, even though they gave it anyway. However, they helped the Lion Guard get their parts together and got them to look like lions. She even performed in the Christmas performance for them.
Mtoto and Pumbaa are allies. When the kids were scared of the Zimwi, Pumbaa and Timon told them a tale about Timon's Ma when she heard of it.
Mtoto asked his herd to be in the Christmas performance for them.
Makini has a good relationship with Timon and Pumbaa. At Ukumbusho, Makini is standing next to them watching the show. In Timon and Pumbaa's Christmas, Makini is excited to hear the story of how they brought Christmas into the Pride Lands. They even agreed to put on a show for her Mpando Mpaya.
When Bunga wanted to put on a show for his adopted uncles to make Dandy Claws come, Fuli asks the baboons to perform in the show. Uroho becomes friends with him after they helped out in The Twelve Ways of Christmas.
When Kovu and Vitani were cubs Pumbaa disliked them since he was best friends with Simba. When Kovu was older he came into the Pride Lands to spend time with Kiara. During his time their he had lots of fun with Punbaa and Timon. When the Outsiders joined Simba's Pride Pumbaa started to like them.