My only theory would be between Lisa's red dress, the red car, and a red shirt on Bart, they went with a blue shirt to give some contrast. I imagine a conversation going a bit like this "There's a lot of red in that artwork." "Well I can change the car color or I can change clothes colors" "Nah, red is a good sports car color. Didn't Bart wear a blue shirt for a while?" "OK, blue shirt it is"

#Addy Thankyou you are a massive help, its encouraging to know it can be done idk if i'll ever be at the level where i can do it but knowing that it is possible is a motivator :)

like i am aware that it would be possible to replace apu with ned or barney etc, but would it be theoretically possible to repace the kwik E mart with something like the try n save or the monstro mart etc?

Definitely doable but requires modelling skills (for the main part, anyway). Not my area.

ahh i see so the actual gag could work and be implimented but the "end game" for lack of a better phrase couldnt (at least currently)

i know my main idea as such as was to rpelace the apu levels with other characters and cars ( got a few ideas aas to who but unsure yet)
as if the creators have decided to never use apu on screen again i thought, well if they ever gave SHAR the remaster treatment they would remove or replace apu/ kwik E mart missons themselves

like i am aware that it would be possible to replace apu with ned or barney etc, but would it be theoretically possible to repace the kwik E mart with something like the try n save or the monstro mart etc?

Thanks #Addy i am going to start small with this of course , right now i am going to use this post mainly for getting the idea of what im wanting to do out of my brain and written somewhere kind of thing,
as i know from reading other posts on the forum and comments on mods etc that alot of people dont understand the limitations of what can and cant be done within the game
so i thought if i write down what it is im hoping to achieve, if its something thats outrighgt impossible or something that has already been done then i'll be able to change my ideas accorindgly instead of working myself into a frenzy trying to complete the impossible

i dont know if that message even makes sense but hopefully it does lol :) anyways thankyou for your quick response

I'd recommend starting small and making little changes to get a feel for how the game works in general and for the different tools and file types. Once you feel comfortable with those, you can begin to use them to built bigger things and make more complex changes. I'd also advise joining the Discord server as it has a ready "#modding-help" channel where you can ask questions and such.

My first idea was a way for cards/ collectables/secrets etc. to be found by interacting with objects rather than to be found in game

then screen goes black and when it comes back you have a " i voted for kodos" card or something.

These ones isn't really doable from what I understand.

for example by pressing action button on the grill in the simpsons backyard (which in the base game just makes a fire animation) a sound file from the show "the burgers are getting cold guys....holy moly" happens and a green light abducts the homer character model into the sky

Oh, that's definitely a good idea. A nice and pretty easy task to get used to editing gags and sound effects, too.