Nintendo has registered new CPSIA certificates of compliance for several amiibo figurines. Among those included are Ike, Meta Knight, Sonic, SMB Luigi, SMB Yoshi, and Marth. Generally, registering CPSIA certificates indicate that the product will be hitting store shelves relatively soon. For those who do not know, all companies must register a CPSIA certificate for any toy that is to release on US store shelves.
Nintendo has already confirmed that a Marth restock would be on the way this May. Perhaps a decent stock of Meta Knight and Ike figurines are inbound as well?