DraStic

You can say it is very accurate, but of course not the real DS.

About how the framerate is shown:
The first % is how fast the game is running compared to his original speed.
100% is full speed, 200% is double speed, 50% is half speed etc.
This is of course a calculation, it is normal for it to ...

New 3DS spec is :
CPU 804 MHz ARM11 MPCore quad-core
Memory 256 MB (64MB dedicated to the OS), 10 MB VRAM

While Snapdragon 855 :
Snapdragon 855 is a high-performance 64-bit ARM LTE system on a chip designed by Qualcomm and introduced in late 2018. Fabricated on TSMC's 7nm process, the 855 features ...

Does having 100% framerate with 0 frameskip+latency equal to THE REAL DS ?

Except that the framerate changes all the time ranging from 99.1% to even 101.9%. (The option says framerate but not showing 30/60 fps like fps usually is, but using %)

Coz I'm playing Rhythm Heaven and also Trauma Center ...