Who are the most popular characters to include in baby Mario and baby Luigi fanfiction, aside from themselves?

Mario could be a great addition. Since Luigi is Mario's brother, his presence could add some family - related drama or comical moments. Sonic could also be included. As Tails' friend, Sonic's brash and confident personality would contrast well with Luigi's more timid nature.

Natsu could be a great addition. He could be the fun - loving uncle figure who always gets the baby excited with his boisterous personality. His presence would add some humor to the story, like when he tries to teach the baby some of his fire - based magic tricks in a not - so - safe way, and Gajeel has to step in.

Michel could be one of the popular characters. He might be giving his very sarcastic yet endearing comments about the baby. And Taylor. He could be trying to enforce some town rules regarding the baby, like making sure the stroller is parked in the right place or that the baby doesn't make too much noise during town meetings. His over - the - top personality can create some interesting interactions in the fanfiction.

One idea could be that baby Mario and baby Luigi get lost in a magical forest filled with strange creatures. They have to use their baby wits and little jumps to get through obstacles and find their way back home. Maybe they befriend a little fairy who guides them part of the way.

Louis could be a great character to include. He might initially be shocked but then become overly excited and offer all kinds of unwanted advice. Jessica could also be in it, perhaps as a mentor figure for Harvey and Donna, giving them advice on how to balance family and work.

Oracle is a great character to include. She can provide the technological support and intel that both Red Hood and Batman need. Her relationship with Batman also adds an interesting dynamic.

One character that might be popular is an older neighbor. This neighbor could have a lot of experience with raising children and offers wisdom and support to Ben and Riley. They might be the ones who help Ben and Riley resolve a big argument they have over the baby's upbringing. Another popular character could be a daycare provider. Since the baby needs care while Ben and Riley are working or dealing with other things, the daycare provider could be a source of both comic relief and important advice in the fanfiction.

Princess Peach would be a great addition. She could be in trouble as usual, and Mario and Luigi have to rescue her. But this time, she could also play an important role in helping them solve a mystery or defeat a powerful enemy. For example, she might have some knowledge about an ancient artifact that the brothers need.

Arya could be a popular character. She might be the fun - loving aunt who teaches the baby some cool combat skills in secret, much to Jon and Sansa's initial dismay but later acceptance. She could bring a sense of adventure and a different perspective to the baby's life.

Narcissa Malfoy could also be important. As Draco's mother, she might have mixed feelings about the situation. On one hand, she wants to protect her son, but on the other, she might see the potential good in Harry and Draco working together for the baby's sake.