Quoted By:
>GBA era
>Deoxys forms are exclusive to different games, but in link battles, show up just as Normal Forme, but retaining their actual stats
>DS era
>Altered Giratina when battling a DP copy, or B/W Kyurem while battling a BW copy both show up in as their original forms while retaining their actual stats/abilities
>3DS era, when games can be patched with ease
>Gamefreak forces you to buy the next game since ORAS users can't use their new Megas against XY owners, and USUM users can't use the new UBs against SM owners
