In the anime, "Kuriboh" monsters are notable for being the Spirit partners of the main characters. A few episodes point out that "Kuriboh" monsters have special connections to the main characters who own various versions of this card.
While no "Kuriboh" monsters make an appearance in the Yu-Gi-Oh! ARC-V anime, the manga has Yuya using "Performapal Kuriborder", which prevents a direct attack, negates battle damage, and recovers LP equal to the negated damage.
"Kuriboh" monsters are generally defensive in nature, and on their own, they tend to prevent battle damage from occurring to the user. However, some of their support cards allow them to rapidly turn the tables upon the opponent, such as the powerful "Winged Kuriboh LV10" and "Detonate". Most "Kuriboh" monsters have 200 DEF, so "Flamvell Poun" would be perfect for searching your Deck for them. So far, all non-monster support cards for the "Kuriboh" monsters are Quick-Play Spell Cards, allowing them to function quickly in a themed Deck.
Discard this card to negate the activation of your opponent's monster effect that would inflict damage. Banish this card from your GY when an opponent's monster declares a direct attack to draw 1 card, Special Summon it if it is a monster, and change the attack target to it.
Discard this card at the end of the Battle Phase to Special Summon 1 monster from your GY that was destroyed by battle and sent there this turn. Banish this card from your GY to Special Summon any number of "Kuriboh" monsters from your GY when an opponent's monster declares an attack.
Equip this card from your hand to an opponent's monster that declared an attack and prevent it from attacking while equipped. Special Summon this card from your GY when an opponent's monster declares a direct attack, but banish it when it leaves the field.