[BR] Teal Mask Ogerpon ex (TWM 25). Gengar & Mimikyu-GX (TEU 165). Subject: Request

Teal Mask Ogerpon ex (TWM 25). Gengar & Mimikyu-GX (TEU 165). Subject: Request for Investigation: Horror House-GX Restriction May Not Be Properly Applied to Abilities

Hello TCG ONE team,

I would like to request an investigation into a potentially broader implementation issue involving Horror House-GX.

During a game in which the effect of Horror House-GX was active, my opponent was able to use Teal Mask Ogerpon ex’s Teal Dance Ability to attach a Basic Grass Energy card from their hand to itself.

This interaction raises concerns that the restriction imposed by Horror House-GX may not be correctly enforced when an opponent uses an Ability that involves playing or attaching a card from their hand.

Rather than being limited to this specific card interaction, I would appreciate it if you could investigate whether the game engine correctly applies the Horror House-GX restriction to all relevant Abilities that allow cards to be played or attached from the hand.

In particular, could you please verify whether this is an isolated interaction issue or a more general bug affecting the implementation of Horror House-GX?

I can provide the game log and additional details to help reproduce the issue.

Thank you for your time and for maintaining TCG ONE.


------------------Begin Game Log------------------
The game is about to start
Type: QuickPlay
Format: Unlimited
Battle begins between Solas_Ray555 and Monke_God!
Monke_God will take additional mulligan(s) after Solas_Ray555 sets up to play.
Mulligan phase: Monke_God took 1 additional mulligans
Solas_Ray555 drew 1 extra cards.
Coin flip [Opening Flip]: TAILS
Monke_God will start
Game setup complete
Between turns
Turn 1 begins
Monke_God drew 1 card
Monke_God played Dawn (PFL 129).
Monke_God has shuffled deck.
Put [Bayleef (N1 28), Meganium (N1 11), Chikorita (N1 53)] to Hand
Monke_God has shuffled deck.
Put Chikorita (N1 53) onto bench.
Attached a [G] Energy to Applin
DEBUG: Applin’s Current_Energy_Cards: [[G] Energy]
Monke_God played Bug Catching Set (TWM 143).
Put [Teal Mask Ogerpon ex (TWM 25)] to Hand
Monke_God has shuffled deck.
Put Teal Mask Ogerpon ex (TWM 25) onto bench.
[G] Energy was discarded
Applin retreated.
Teal Mask Ogerpon ex is now active
Teal Mask Ogerpon ex {PB3} has used Teal Dance
Attached a [G] Energy to Teal Mask Ogerpon ex
DEBUG: Teal Mask Ogerpon ex’s Current_Energy_Cards: [[G] Energy]
Monke_God drew 1 card
Monke_God played Ultra Ball (SUM 161).
Briar (SCR 171) was discarded
[G] Energy was discarded
Monke_God has shuffled deck.
Put Dipplin (TWM 18) to hand
Monke_God has shuffled deck.
Between turns
Turn 2 begins
Solas_Ray555 drew 1 card
Put Latias ex (SSP 239) onto bench.
Solas_Ray555 played Battle VIP Pass (FST 225).
Solas_Ray555 has shuffled deck.
Put Gengar & Mimikyu-GX (TEU 165) onto bench.
Put Mew ex (30C 66) onto bench.
Solas_Ray555 has shuffled deck.
Attached a Telepathic Psychic Energy (POR 88) to Mew ex
DEBUG: Mew ex’s Current_Energy_Cards: [Telepathic Psychic Energy (POR 88)]
Solas_Ray555 has shuffled deck.
Put Shuppet (PBL 33) onto bench.
Solas_Ray555 has shuffled deck.
Unown retreated.
Mew ex is now active
Unown {PA1} has used Farewell Letter
Unown (AOR 30) was discarded
Solas_Ray555 drew 1 card
Solas_Ray555 played Trainers’ Mail (AOR 100).
Put [Lillie’s Determination (MEG 169)] to Hand
Solas_Ray555 has shuffled deck.
PokéStop (PGO 68) is now in play.
Solas_Ray555 played Lillie’s Determination (MEG 169).
Put 3 cards to Deck
Solas_Ray555 has shuffled deck.
Solas_Ray555 drew 8 cards
Solas_Ray555 played Battle VIP Pass (FST 225).
Solas_Ray555 has shuffled deck.
Put Unown (AOR 30) onto bench.
Solas_Ray555 has shuffled deck.
Unown {PA7} has used Farewell Letter
Unown (AOR 30) was discarded
Solas_Ray555 drew 1 card
Solas_Ray555 played Rescue Carrier (CRZ 142).
Put [Unown (AOR 30), Unown (AOR 30)] to Hand
Put Unown (AOR 30) onto bench.
Unown {PA8} has used Farewell Letter
Unown (AOR 30) was discarded
Solas_Ray555 drew 1 card
Put Unown (AOR 30) onto bench.
Unown {PA9} has used Farewell Letter
Unown (AOR 30) was discarded
Solas_Ray555 drew 1 card
Put Unown (AOR 30) onto bench.
Unown {PA10} has used Farewell Letter
Unown (AOR 30) was discarded
Solas_Ray555 drew 1 card
Solas_Ray555 played Rescue Carrier (CRZ 142).
Put [Unown (AOR 30), Unown (AOR 30)] to Hand
Put Unown (AOR 30) onto bench.
Unown {PA11} has used Farewell Letter
Unown (AOR 30) was discarded
Solas_Ray555 drew 1 card
Put Unown (AOR 30) onto bench.
Unown {PA12} has used Farewell Letter
Unown (AOR 30) was discarded
Solas_Ray555 drew 1 card
Solas_Ray555 played Secret Box (TWM 163).
Battle VIP Pass (FST 225) was discarded
Espeon ex (PRE 155) was discarded
Rescue Stretcher (BUS 165) was discarded
Solas_Ray555 has shuffled deck.
Put [Xerosic’s Machinations (SFA 89), PokéStop (PGO 68), Trekking Shoes (ASR 215)] to Hand
Solas_Ray555 has shuffled deck.
Used PokéStop effect
Buddy-Buddy Poffin (TWM 223) was discarded
Trekking Shoes (ASR 215) was discarded
Telepathic Psychic Energy (POR 88) was discarded
Put [Buddy-Buddy Poffin (TWM 223), Trekking Shoes (ASR 215)] to Hand
Solas_Ray555 played Trekking Shoes (ASR 215).
Buddy-Buddy Poffin (TWM 223) was discarded
Solas_Ray555 drew 1 card
Solas_Ray555 played Trainers’ Mail (AOR 100).
Put [Acro Bike (CLS 178)] to Hand
Solas_Ray555 has shuffled deck.
Solas_Ray555 played Acro Bike (CLS 178).
Put 1 card to Hand
Double Colorless Energy (GRI 166) was discarded
Solas_Ray555 played Trainers’ Mail (AOR 100).
Put [Acro Bike (CLS 178)] to Hand
Solas_Ray555 has shuffled deck.
Solas_Ray555 played Trekking Shoes (ASR 215).
Mew ex (30C 66) was discarded
Solas_Ray555 drew 1 card
Solas_Ray555 played Trekking Shoes (ASR 215).
Put 1 card to Hand
Solas_Ray555 played Acro Bike (CLS 178).
Put 1 card to Hand
Startling Megaphone (FLF 97) was discarded
Solas_Ray555 played Rescue Stretcher (BUS 165).
Put [Unown (AOR 30), Unown (AOR 30), Unown (AOR 30)] to Deck
Solas_Ray555 has shuffled deck.
Solas_Ray555 played Acro Bike (CLS 178).
Put 1 card to Hand
PokéStop (PGO 68) was discarded
Solas_Ray555 played Trainers’ Mail (AOR 100).
Put [Buddy-Buddy Poffin (TWM 223)] to Hand
Solas_Ray555 has shuffled deck.
Solas_Ray555 played Buddy-Buddy Poffin (TWM 223).
Solas_Ray555 has shuffled deck.
Put Unown (AOR 30) onto bench.
Solas_Ray555 has shuffled deck.
Unown {PA13} has used Farewell Letter
Unown (AOR 30) was discarded
Solas_Ray555 drew 1 card
Solas_Ray555 played Rescue Carrier (CRZ 142).
Put [Unown (AOR 30)] to Hand
Put Unown (AOR 30) onto bench.
Unown {PA14} has used Farewell Letter
Unown (AOR 30) was discarded
Solas_Ray555 drew 1 card
Mew ex used Horror House GX
Between turns
Turn 3 begins
Monke_God drew 1 card
Teal Mask Ogerpon ex {PB3} has used Teal Dance
Attached a [G] Energy to Teal Mask Ogerpon ex
DEBUG: Teal Mask Ogerpon ex’s Current_Energy_Cards: [[G] Energy, [G] Energy]
Monke_God drew 1 card
Used PokéStop effect
Noctowl (N1 42) was discarded
Boss’s Orders (RCL 200) was discarded
Meganium (N1 11) was discarded
Between turns
Turn 4 begins
Solas_Ray555 drew 1 card
TURN TIMER: a Timeout Allowance was consumed to add 40 seconds to turn time

Triage Agent: Valid, and already fixed. Same cause as Possible TCG ONE Bug — Ditto Prism Star Evolves During Horror House-GX. Teal Dance attaches a card from your hand, and Horror House GX forbids that (TPCi Rules Team 2021-07-01; the official Japanese Q&A refuses Cherrim’s Spring Bloom, Frosmoth’s Ice Dance and Haxorus’s Grind Up the same way). Your game on 2026-10-29 ran the engine deployed on 2026-10-27, which didn’t have the fix yet; it went live on 2026-10-30 (commit 9b0affbbc), and a test now covers Teal Dance.

On the general question: Horror House GX now also stops Abilities and attacks that attach or bench a card from the hand without marking it as played from the hand (Haxorus UNM 156, Greninja-GX SM197). That fix goes live with the next engine update.

I have one question regarding Horror House GX.

Is there a possibility that discarding cards from the hand could mistakenly be treated as moving cards from the hand into play, and therefore be prohibited by Horror House GX?

My understanding is that discarding a card from the hand is neither playing a card nor putting a card into play, so it should still be allowed.