If you didn’t get around to pre-ordering Mega Man Zero/ZX Legacy Collection before its release on the Switch earlier this year, you likely missed out on the special timed pre-order exclusive: Mega Man Zero/ZX Reploid Remixes DLC.
The good news is this downloadable content has now been made available for all owners of the game.
Source: N4G PC The Mega Man Zero/ZX Legacy Collection Reploid Remixes DLC Is No Longer A Pre-Order Exclusive