If you have a Wii that never downloaded the game, you cannot buy it. Nintendo’s Wii Shop Channel closed in 2019. Your only legal option is to find a pre-owned Wii that still has the game installed – but that’s rare and not transferable.
Here’s a solid, informative post for a retro gaming forum or community, focusing on Castlevania: The Adventure Rebirth in the context of the scene.
Repacks are often checked for corruption to ensure the game doesn't crash during later levels.
Choose between Easy, Normal, and Hard modes to suit your skill level. 💿 The "Hit Repack" Context