(Request) Gecko Code for unlocking single karts/characters, not all of them

[Zeraora]

Hey Mario Kart Wii community, modders and enthusiasts,
I'd like to request a Gecko code that lets you unlock single karts/bikes and characters. 

I'm aware that there is a code for unlocking everything, but 1. I want to unlock as much as possible myself and 2. strangely, the game won't save Time Trail data, even though I have really good times (2:09 on Warios Gold Mine for example, beaten the developer, but the game won't save my ghost data).

So I am in need of a code that unlocks only the karts/bikes and characters you'd get from Time Trial (Birdo and Toadette, Sprinter and Spear.
I already have Funky Kong, Baby Luigi, Tiny Titan and Magikruiser because it still worked a few days ago).

I'm not really good with coding and all that technical stuff, so if someone could make that code it would be much appreciated

With something like this, the code would need to find the check to see if you completed the requirements of the certain character and set its value to be yes. The game would prompt the unlocking sequence but this probably the easiest way of doing something like this.