Fun fact: the barbarian has a character sheet online so you can actually put him into campaigns. He is indeed level 20 and has legendary actions

Barbarian canonically is enlightend and has a band of intelect. His lowest stat is his charisma at 18. The man is a beast

"Burn down the gnome forest? What did the gnomes do!?"
A lot. They did a lot. Watch some of the other dungeon soup videos outside of the Barbarian, and you will not be questioning that item anymore, I promise.

Something to notice on the “Dragon Balls” is that each ball is from a chromatic, so he’s only going after evil dragons

Barbarians share one singular braincell, but it is extremely large and highly networked.

So i heard that Kevin is a celtic style oath bound paladin which gains power from oaths but loses much more if broken. So like he was a pretty okay adventurer untill those pegasus oaths absolutely juiced him. He can absolutely play with the Barbarian save his lack of life experience.

55:28 in the context of the Dungeon Soup universe, Trust me, The Gnomes have it coming.

there is a 12-hour version of "My Blade"
he stops screaming in hour 4
Barbarian starts moving so fast he appears to have 2, and then eventually 3, striking toothpicks

Fun little fact that doesn't get mentioned usually, when kevin finds the pegasus it is standing on a suspiciously perfect circle of flowers, this is usually called a fairy ring and implies it was never a pegasus to begin with but rather an evil creature pretending to be a pegasus, a great excuse for the barbarian to get his cheevo without harming good beings though!
As far as settings, I like to use Faerun as a base and then morph it as I need to fit the story, it's easier to modify the list of monsters than make a whole new continent after all.

About the dolphin joke you must remember that part of the CG barbarian development was drawing every card in a deck of many things which means in his current state chaotic good which means in his original state he was lawful evil.  According to his mental makeup it would simply allow for him to be evil to evil creatures so it is not out of nature for that particular barbarian.

"That'll be a Wisdom save and Barbarians tend to have higher wisdom than intelligence"
His Intelligence stat:19 (from a Circlet of Intelligence)
His Wisdom stat: 30

Dinglemire looks like that because he's played by (and originally a creation of) Joel Haver who does funny skits using rotoscope animation.

He doesn't need a nat20 intimidation check
Charisma at 18, Intimidation is 10, +2 from the werebear cloak and he has "Intimidating Presence" as one of his traits

Loophole: Pegasus only said no fair maidens, so filthy harlots are still on the table.

13:18 "Poor Paladin, at least i think he's a paladin" I mean with the amount of oaths he is now under

Kevin can bed ladies of the evening, widows, married women because  by definition  they are not maidens

21:11 I don't quite know how true this is, but apparently there's an enchantment where if your opponent has consumed one entire lemon within the past 24 hours, your blade will instantly shatter on contact with them

There's also a character sheet for the chaotic good barbarian. And I'm telling you this MF is the most OVERPOWERED dnd character ever written. Some things he has done is achieve enlightenment, pull every card from a deck of many things(note he is still alive) and he literally killed a Tarrasque during this series just offscreen in between epidodes. This character had no balance control from a DM whatsoever.

The Hag got a first person view of the Lichs' phalactory lol

12:10 congratulations on being only the second person I've ever seen who wondered "Where did the hand come from?"