I accidentally found one long ago...it’s game threatening. I can’t remember it exactly, but its basic features...
If you go into Silph Co. , 5th floor, go to that meeting desk near there, at the bottom left corner or the screen at the leftmost. Then, you can actually get trapped by a team rocket grunt. you can’t use Escape Rope, and it’ll wait until you start going to the corner. Once it comes down, it traps you from moving from that corner due to the “force field around people” or vice versa. (etc you can’t go to close to some objects/people/other.)
So the game thinks its an object you couldn’t get to close to in the first place. It doesn’t realize you are behind it so it keeps you still. But with player’s movement. sometimes, you can even get team rocket clothes on if you kept the default clothes.
I believe that the game thinks it’s a trainer and will walk up to you until you can’t move. Once you defeated the game, however, it cant occur. But if you do this before you defeat the elite four, it locks you with this grunt. But, you can fix it if you spawn another trainer with the joystick. this will not be any help on a Nintendo lite. So I recommend saving your progress before entering Silph Co. Or exploring every nook and cranny of 5f with a lite. I found a video on it: https://www.youtube.com/watch?v=yd3monv1v3s