I think one of the most common fan made modes that people like to do is 'Hide And Seek.' so I was thinking...why not officially add it into Secret Neighbor as a Brawl Mode?
The basic idea is the Neighbor will spawn in his room while the kids/hiders will spawn outside the neighbor's house, (IDK what map this will be on. Let's do Map 1 for example). Neighbor cannot turn into kid form and will have to remain in that state for the entire game. The kids get a short period to run and hide before the Neighbor's bookshelves get activated with a notification that the Neighbor is now seeking. Kids have two ways to win, hiding until time runs out or using the many bathtubs to speed up the time in the game and provide a speed boost (Bathtubs activate a bit after Neighbor's bookshelves are unlocked). For the Neighbor, the only way to win is to find all the hiders and capture them before the time runs out.
Kids and Neighbors cannot use their abilities, nor is throwing items allowed. However everyone is given a flashlight to use to illuminate their path. There is ONE sole exception for this and that's the super sonar in the neighbor room. This sonar (when its cooldown ends) when used detects all kids and even the neighbor himself when used even if you're hiding inside of a closet so kids cannot remain in the same spot or hog a closet the entire game. Neighbor's stamina is extended as well as his speed (optional)
Kids will gain XP and coins for how long they're alive and hidden as well as how many power up bathtubs they used
Neighbor will gain XP and coins for how many hiders he grabs and possibly how quick he wins the match
(OPTIONAL)
The powertub tubs not only speed up time but unlock the classes abilities
Bagger allows him to carry items and use chairs. (Rifles will not spawn, don't think about it.)
Brave allows herself to escape from being caught after using 2-3 power up tubs
Detective can use his photo to see where the Neighbor is (with a heavy cooldown)
Inventor gains access to his tinker skill again and can build select items like the Threat Detector
Leader can blind the neighbor and run fast, inspiration has more of a cooldown as should be a last resort
Scout gets her slingshot back but only a few nuts.
The neighbor can even use bathtubs to power himself up however time will still be reduced
Scary Neighbor can set up his traps again to catch the kids if they decide to move around.
Butcher can use pathfinder and if he uses another bathtub, he'll gain a short ranged hook
Clown can disguise to get the drop on the kids, and if he activates another one, gets a single use smokebomb
Ghost will...eh, I don't know about him, I don't think it's a good idea if he can fly around as it'd make the game too easy.
Guest will regain his leap ability.
Let me know what y'all think in the comments, leave your own feedback yourself too.

