Original game where the "possible bug" was spotted : https://replay.pokemonshowdown.com/gen9customgame-1983526809-cqcxscdeyx45y11ihn8d3drllsdb3clpw
Custom test for Mold Breaker : https://replay.pokemonshowdown.com/smogtours-gen9customgame-729382
Ndex : https://replay.pokemonshowdown.com/smogtours-gen9natdexdraft-729383
CustomG : https://replay.pokemonshowdown.com/smogtours-gen9customgame-729384
Regular Draft : https://replay.pokemonshowdown.com/smogtours-gen9paldeadexdraft-729385
Globally, Battle Bond doesnt work on non greninja-bond in custom game, even regular greninja, while it works on others tiers. We were thinking it might be a bug occured due to the fact that it was a custom game and there was a Mold Breaker mon on the field, but it looks confirmed it isn't due to Mold Breaker with those tests so it might be only on custom.
Custom test for Mold Breaker : https://replay.pokemonshowdown.com/smogtours-gen9customgame-729382
Ndex : https://replay.pokemonshowdown.com/smogtours-gen9natdexdraft-729383
CustomG : https://replay.pokemonshowdown.com/smogtours-gen9customgame-729384
Regular Draft : https://replay.pokemonshowdown.com/smogtours-gen9paldeadexdraft-729385
Globally, Battle Bond doesnt work on non greninja-bond in custom game, even regular greninja, while it works on others tiers. We were thinking it might be a bug occured due to the fact that it was a custom game and there was a Mold Breaker mon on the field, but it looks confirmed it isn't due to Mold Breaker with those tests so it might be only on custom.