These are the first reviews I could find:
Tennis:
http://www.nintendoworldreport.com/review/35883
Bowling:
http://www.nintendoworldreport.com/review/35884
They seem to like the games, but the site's name can be indication of some bias.
My 1000th post: https://gamrconnect.vgchartz.com/post.php?id=9368779