Maybe the Kensis Collar has the ability to transform the wearer. In a fanfiction plot, a character accidentally puts on the collar and starts to change in unexpected ways. This transformation could be physical, like growing wings, or it could be a change in personality, becoming more assertive or powerful. The other characters then have to deal with this new version of their friend or foe.
It could also be used as a symbol of power. A new character enters the Lost Girl world wearing the Kensis Collar, and this immediately makes them a target. Other characters either want to befriend them for the power they seem to possess or try to take the collar by force. This can create a lot of political intrigue among the Fae characters.
The Kensis Collar could be a MacGuffin. For instance, a character is given the task to protect the collar at all costs. This simple premise can lead to a lot of action and adventure as various forces try to take the collar from the protector.
One possible storyline could be about the significance of the Kensis Collar in the Lost Girl universe. Maybe it has some magical powers that are yet to be fully explored. For example, it could be a key to unlocking a hidden realm within the show's world.
The dog collar can be a plot device. If it has special powers, it can change the course of battles. For example, if it can create force fields, it can protect the dog and its owner from enemy attacks.
The umbrella could be a magical object. For instance, it could be a tool given by a new kwami that helps Ladybug and Chat Noir in their battles. It might have the power to create force fields or to fly.
One way is to make it a key ingredient in a forbidden potion. For instance, a dark wizard might be trying to create a powerful potion using lanolin from a rare magical sheep, and the main characters have to stop him.
A simple plot could be that a group of Pokémon including Kirlia and Riolu live in a village near a lemon grove. One day, the lemons start to wither for an unknown reason. Kirlia uses its psychic powers to try to figure out what's wrong, and Riolu scouts the area for any signs of trouble. They find out that a dark - type Pokémon is draining the energy from the lemons. So, they team up to defeat this Pokémon and save the lemons.
In a more comical plot, the Dodo could be a pet of a clumsy new professor at Hogwarts. The Dodo's antics, like constantly getting lost in the castle or stealing food from the Great Hall, could cause all sorts of chaos. And the main characters have to help the professor keep the Dodo in check while also dealing with their own magical studies and adventures.
The hummingbird could be part of an experiment gone wrong. Suppose Tony is working on a new energy source and accidentally creates a portal or something that sucks in a hummingbird. Then he has to figure out how to get the hummingbird back to its normal state and in the process, discovers something new about his technology.
Runes can be incorporated by having a character discover an ancient rune - covered artifact. This could start a quest to understand its power and purpose. For example, a character might find a rune - engraved amulet that holds the key to a long - forgotten magic.
The breeding bench could be part of a scientific experiment gone wrong in the supernatural world. A mad scientist - type character tries to use it to create the ultimate supernatural being, but instead, it creates chaos. Maybe it starts mutating existing supernatural creatures in unexpected ways.
A lucky charm can be incorporated by making it a key item for a mission. For example, the characters are sent to retrieve a powerful lucky charm that is said to bring victory to the village that holds it. Another way is to have a character find a lucky charm that gives them an edge in training, like they can train harder without getting tired as long as they have the charm with them.