Mechanics Duplicate moves and PP behavior in Gen 1

[DerpySuX]

What type of bug are you reporting? Unsure

What is the bug?
I’m honestly not too sure if this is a genuine bug or just RBY jank but during a game of CC 1v1 my opponent mimicked my double team while having their own double team, and this resulted in an infinite PP glitch.

Honestly this is kinda funny lmao

Are you able to replicate it? If so, how?
https://replay.pokemonshowdown.com/gen1challengecup-2168993410?p2

 

[DaWoblefet]

Mimic can copy a move the Pokemon already knows in Generation I, but the PP behavior is incorrect. In modern generations, using a duplicate moveslot move will only deduct PP from the first moveslot available, and then once PP runs out, the move will just fail every time when used. In Gen 1 however, you can have multiple copies of the same move in your moveset and run out of PP for each of them independently. Looks like the modern generation behavior is also bugged (because it should prevent the move's usage, not allow it to be used again with no consequence). But I don't know all the mechanics of duplicate moves across all generations, so for the purposes of this thread, the Gen 1 behavior specifically is bugged.

Another sample replay and screenshot showing the bug:
https://replay.pokemonshowdown.com/gen1ou-2169816571