I walked in tall grass and encountered a Pokemon called "-----". It says it is Lv0 and 0 HP. But its weird and impossible to find its real :/ Can someone help me tell what ----- actually is? I mean, how could a Pokemon be Lv0 and 0 HP when someone encountered it?
Congrats, you just encountered a Glitch Pokemon.
Read up on it here: Bulbapedia/ -----