That's how I made the physics in Amiboo Training Simulator. I googled it.
There isn't some kind of magic command that will create physics. You have to code them yourself with the actual laws of gravity and such.
I searched google but nothing helps. Could you send me a simple example? (Could you label everything) and could you try to use circle pad controls?
P.S. do you have any tutorials online for jumping and platforming?
I kinda want to do it, but I'm super busy and I don't have the time to make such example program.
For the circle pad, there's a tutorial on SmileBASIC Source, but you can try
PX=200
PY=120
SPSET 0,0
SPHOME 0,8,8
REPEAT
STICK OUT SX,SY
INC PX,SX
INC PY,-SY
SPOFS 0,PX,PY
VSYNC
UNTIL 0
As for an online tutorial, I recommend the first result when looking up "Game Physics 101".