Is Inkwell from an amiibo figurine - I don't think he will move.
You presumably scanned him in? Which means you have a reader or a new 3ds/new 2ds with the reader incorporated.
The easiest way is to buy a single pack of series 1-4 cards (still available in UK, don't know about other countries) or a single card via say ebay? Then you could go for a series 5 Welcome Amiibo card. Another alternative is a custom made card via Etsy.