I don't know if this helps give at least a more legitimate source, but I was speaking to a Nintendo representative on this
Official Nintendo website and they said that Nintendo has had no news on this "discontinuation" being confirmed.
I sent an email to Nintendo at
customer-support@nintendo.co.uk with the following quoted message.
"I have been seeing rumours that these three Amiibo have been discontinued, but I refuse to listen to rumours and so I thought that I shall go and email an official source of information and so I have sent this email to you."
I recieved a reply from Nintendo UK a little while ago stating the following.
"Dear Jason,
Thank you for your email.
Nintendo has no official announcement about your query at this time.
We therefore apologise as we are unable to help you further, however you can keep updated for any further announcements and updates directly from us by signing up to our newsletter at
www.nintendo.co.uk or checking our Nintendo uk online store at
www.store.nintendo.co.uk or alternatively by turning on your 'Home Notifications' on the Nintendo 3DS and Wii U. Additionally you can find further information and updates using the Nintendo Wii U and the 3DS Miiverse application.
We hope this information helps you out, and we wish you a happy gaming experience. If you have any further questions or queries, please do not hesitate to contact us.
Kind regards,
Adrian Wrey
Your Nintendo UK Team
0345 60 50 247"
I hope this helps and is a good source.
I
never post anything online without a credible source anyway.
A quick google search of the phone number in the reply shows that it IS Nintendo UK indeed.
https://www.google.co.uk/?gws_rd=ssl#q=0345+60+50+247 (The first three results are Nintendo UK)
Again, hope this helps you all.
