Anyone has done fighting game using panda3D?
I am curious about how the collision can be done.
I’ve moved the thread from Showcase, since you didn’t actually show anything. 
Have you seen the Boxing Robots sample? You could just make sure the two fighters are at a fixed distance when they kick/hit, and then just play an animation. (E.g. if fighter 1 plays “kick1” animation, fighter2 either plays “dodge1” or “die1” animation.)
Or, if you want something more advanced, you could setup collision tubes and spheres for the feet/hands/sword of the players.
If you don’t want to use animations, you could use a physics engine (like ODE), and setup a ragdoll which gets activated as soon as the fighter gets hit by a sword or so. That might be overkill for a simple fighting system though.
I would be using only animations.
I look through collision objects in the manual but i am not sure how i can implement it.