Why? The Switch is essentially a tablet with the power of a PS3.5. Bloodstained was a modern, high-fidelity game squeezed onto a cartridge. The physical release (XCI) and the digital download (NSP) both suffered, but the NSP became the focus of a unique community effort.
The base game takes up roughly on your console. However, if you plan to update the game with patches and expand it with post-launch content, make sure you have extra space allocated on your microSD card to accommodate the large system updates. Nintendo Switch Gameplay Performance