Tested by using Amnesia on a deoxys with “Barrier Attack”. Before using “Form Change” it’s successfully blocked, but once it does “Form Change” into an identical Deoxys from the deck, the new one can use “Barrier Attack” without issues when it should be blocked.
As a side note, special conditions and other internal values (like turn put into play, or turn last evolved) would seem to work fine.
Cards potentially affected by this (would need checking some of them though) include:
- EX era Deoxys/Deoxys-ex cards (and potentially DP ones) with the “Form Change” Poké-Power.
- EX era Ditto cards with the “Duplicate” Poké-Power.
- EX era Castform cards with the “Temperamental Weather” Poké-Power. (Also DP ones with “Temperament”, but those aren’t implemented yet.)
- Unseen Forces’ Unown with the “Shuffle” Poké-Power.
- Possibly Ditto (FRLG 4) with the “Form Variation” Poké-Power.
- Maybe Ditto (Boundaries Crossed and Fossil) with “Transform”, thought that could have issues on its own regarding “evolved Pokémon” checks.
- Wishiwashi (GRI 37)
- Aegislash (XY 86)
- Swoop! Teleporter.
- Nanu and Ninja Boy, on the supporters side.