1.Mankini code where everyone wears a similar costume to MK9 sheeva
2.random fighter code where you look likea random fighter but have the complete moveset of another(you have to figure out which one quickly lol)
3.disco kombat where overhead interactables like swings and vines turn into disco balls and throwable things turn into speakers.
4.nomad dash code where everyone has ndcs
5.a buffed throw kombat code where you can throw them which results in 20% and you tear off a random limb of theirs which regenerates.
6.mk9 dash cancel code
7.injustice block mechanic code.
8.every special has armour code
9.NRS code where the the mechanics are day 0.
10.celebrity code where you turn into a celebrity with the same moveset as usual.
edit:i have an hour to kill so here's some more:
11.lava code which basically means that lava is closing in on you and it covers random points of the stage which you get hurt for standing in.
12.no footsies code
13.random code code
14. random weapons appear on screen or fall onto it from above like grenades, missles, barrels, swords and act like intractables.
15.rainbow code where every character leaves a path like nyan cat.
16.food code where you are a food and have an appropriate attack(eg.banana has an attack like lexs mine where you slip and lose life if you step on it and also maybe a dive because an incoming banana would look hilarious)
17.rko mode where one of those wrestlers does his thing when you do a knockdown like the videos viral atm.
18.get rekt scrub code where you get sunglasses after a combo and it pops up with things like 'TOO PRO','MLG bruh' etc. may also include trippy colours
19.downplayer code, essentially a super buff code that prevents someone from downplaying about their character.
20.swap variation with stance switch code
21.taunt code(replaces stance switch)
22.classic graphics code
23.transition stage code where a throw in the corner takes you to another random stage
24.modern code where everyone is wearing incredibly expensive and formal closthes, like cage P2 in mk9.
25.everyone gets a sort of projectile reflect move that works like pong.