I just wanna see a full guide of how to achieve all the endings on snes and psx for speedrunning

Really you just need to know how to do S, G, H, and D

PSX is not good for speedrunning so D won't be fun

Categories S-F traditionally are just S-Ending with different requirements

S: Truth From Dad, Bobby, Crow, 3rd Floor
A: Truth from Shed, Bobby, Crow, 3rd Floor
B: Any Truth, Bobby, 3rd Floor
C: Any Truth, Bobby, 2nd Floor,
D : Bobby, 2nd Floor
E: Bobby, 3rd Floor
F: Enter the elevator with no information
G: All Friends Dead leave in car
H: One friend dead leave in car

Glitched D : No friends die leave in car

Refer to my S-Ending Tutorial for the full route.

PSX/PC subtract entirely from the speedrun and I wouldn't recommend either one

I´m actually playing on the snes release, but i don´t know how to do the text skip

Everything should be in the S-Ending guide
Text skip is action and item buttons together and then swapping item text

And, what about the glitched D¿ hows that bug works¿

You turn over the spawn point for Bobby

but theres a specific frame¿

It's honestly best watching a vod. Ruadath's TAS or my most recent PB highlight it well. I also have a video on my channel showing it off. Describing it over text for the exact frame is not possible

got ya. in h ending, when you reach the garage, it´s rng when bobby does not appear or it´s a glitch¿

It's RNG if bobby decides to just bail as soon as he enters (which is what happens)

There is a safer, but slower strat which involves climbing the ladder and just waiting for Bobby to leave. (I do this in my run) I'd recommend you go for this unless you're aiming for WR