Brock's Mankey (G1 68). Clefable (JU 17). I used Karate Chop into a Clefable that copied my Clefable's Metronome, and Karate Chop still did 80 damage.
------------------Begin Game Log------------------
The game is about to start
Type: QuickPlay
Format: Prop 15/3
Battle begins between Baiy000r and Charmaster!
Coin flip [Opening Flip]: TAILS
Charmaster will start
Game setup complete
Between turns
Turn 1 begins
Charmaster drew 1 card
[Baiy000r]: gl hf
Attached a [P] Energy to Brock's Mankey
DEBUG: Brock's Mankey's Current_Energy_Cards: [[P] Energy]
Between turns
Turn 2 begins
Baiy000r drew 1 card
Put Clefairy (BS 5) onto bench.
Put Bulbasaur (BS 44) onto bench.
Put Chansey (BS 3) onto bench.
Attached a Double Colorless Energy (BS 96) to Chansey
DEBUG: Chansey's Current_Energy_Cards: [Double Colorless Energy (BS 96)]
Between turns
Turn 3 begins
Charmaster drew 1 card
Put Zubat (TR 70) onto bench.
Attached a [F] Energy to Brock's Mankey
DEBUG: Brock's Mankey's Current_Energy_Cards: [[F] Energy, [P] Energy]
Charmaster played Gust of Wind (BS 93).
Bulbasaur is now active
Brock's Mankey used Karate Chop
Brock's Mankey did 40 damage to Bulbasaur
Bulbasaur was knocked out
Charmaster took one prize card.
Clefairy is now active
Between turns
Turn 4 begins
Baiy000r drew 1 card
Attached a [P] Energy to Clefairy
DEBUG: Clefairy's Current_Energy_Cards: [[P] Energy]
Baiy000r played Computer Search (BS 71).
Baiy000r has shuffled deck.
Clefairy evolved into Clefable (JU 1)
Clefable used Metronome
Clefable copied Karate Chop
Clefable used Karate Chop
Clefable did 40 damage to Brock's Mankey
Brock's Mankey was knocked out
Baiy000r took one prize card.
Zubat is now active
Between turns
Turn 5 begins
Charmaster drew 1 card
Put Clefairy (BS 5) onto bench.
Attached a [F] Energy to Clefairy
DEBUG: Clefairy's Current_Energy_Cards: [[F] Energy]
Between turns
Turn 6 begins
Baiy000r drew 1 card
Clefable used Metronome
Clefable copied Bite
Clefable used Bite
Clefable did 20 damage to Zubat
Between turns
Turn 7 begins
Charmaster drew 1 card
Zubat evolved into Dark Golbat (TR 24)
Dark Golbat has used Sneak Attack
Kangaskhan got 10 damage
Clefairy evolved into Clefable (JU 17)
Charmaster played Computer Search (BS 71).
Charmaster has shuffled deck.
Charmaster played Professor Oak (BS 88).
Charmaster drew 7 cards
Attached a [F] Energy to Clefable
DEBUG: Clefable's Current_Energy_Cards: [[F] Energy, [F] Energy]
Dark Golbat retreated.
Clefable is now active
Clefable used Minimize
Between turns
Turn 8 begins
Baiy000r drew 1 card
Clefable used Metronome
Clefable copied Minimize
Clefable used Minimize
Between turns
Turn 9 begins
Charmaster drew 1 card
Rodyon is now a spectator of the game
Charmaster played Pokémon Trader (BS 77).
Pokemon Trader trades a [Sabrina's Kadabra (G2 58)] in hand for a [Brock's Mankey (G1 68)] from deck!
Put [Sabrina's Kadabra (G2 58)] to Deck
Put [Brock's Mankey (G1 68)] to Hand
Charmaster has shuffled deck.
Put Brock's Mankey (G1 68) onto bench.
Attached a [F] Energy to Brock's Mankey
DEBUG: Brock's Mankey's Current_Energy_Cards: [[F] Energy]
Clefable used Minimize
Between turns
Turn 10 begins
Baiy000r drew 1 card
Clefable used Metronome
Clefable copied Minimize
Clefable used Minimize
Between turns
Turn 11 begins
Charmaster drew 1 card
Attached a [F] Energy to Brock's Mankey
DEBUG: Brock's Mankey's Current_Energy_Cards: [[F] Energy, [F] Energy]
Put Sabrina's Abra (G1 91) onto bench.
Charmaster played Item Finder (BS 74).
Restored a Professor Oak to hand.
Charmaster played Professor Oak (BS 88).
Charmaster drew 7 cards
[F] Energy was discarded
[F] Energy was discarded
Clefable retreated.
Brock's Mankey is now active
Brock's Mankey used Karate Chop
Clefable is weak to FIGHTING
Brock's Mankey did 80 damage to Clefable
Clefable was knocked out
Charmaster took one prize card.
[Charmaster]: Wait, didn't you use Minimize?
[Baiy000r]: I did
[Charmaster]: Why did that do 80 damage?
[Baiy000r]: bug
[Baiy000r]: shouldn't happen
REQUEST TIMER: User did not respond in time. Auto selected Kangaskhan. AFK=1
Kangaskhan is now active
Between turns
Turn 12 begins
Baiy000r drew 1 card
[Charmaster]: I'll report.
Put Brock's Mankey (G1 67) onto bench.
Baiy000r played Imposter Oak's Revenge (TR 76).
Put 8 cards to Deck
Charmaster has shuffled deck.
Charmaster drew 4 cards
Between turns
Turn 13 begins
Charmaster drew 1 card
[Baiy000r]: I assume because I used metronome for minimize