I don't get why it's called that I beat with Luigi. and I might be able to do it with Wario and yoshi. and what is a wall kick? I'snt is supposed to be wall jump?

Yes, it's a Wall Jump. That's not what I call it, though. In the original SM64, your only option was to Wall Kick the walls to get from floor to floor. But in the remake, Luigi's backflip is higher than the others, so you can get up there with him. You can't do it with Wario or Yoshi (without a cap).

However, I think it's funner to Wall Kick.

yeah for yoshi I only got on the first platform and almost the second.(almost not just a couple higher and I would have got it).
and of course you can't go up there with Wario without his cap.

Tubby want a candy bar?

So you got your answer?

I also wondering else with something with the wallkick/walljump
In the courtyard is it possible to get on the roof there with wall jump cause I want to see what's there. (cause I already saw the front of the roof and been on it).

quote Wario doesn't want a candybar

Tubby want a candy bar?

Wario needs to get on a diet he likes pasta more than candy to.

No, you can't, I used AR moonjump, and went on top of the roof, and I just fell through! (I use AR for fun, not to cheat)
And I also tried to do so with the walljump, but I hit an invisible ceiling!