The technology used in the adapter or the remote is compatible only with games that have been specifically developed to use its functionality or can improve all the games that doesn't specifically support it? If it's the first can someone post a list with the games that require motion plus or using the motion plus will improve the gameplay? Thanks!
I think (though I'm not positive) that only games that were designed for it actually use it. Here's a list of supported games: https://en.wikipedia.org/wiki/List_of_games_that_support_Wii_MotionPlus Apparently some Wii U games support it, too.
Thank you @la-li-lu-le-lo for your answer but I will wait for a technical response from someone else. I read that article from the wiki page but it's not something technical or sure if that is true or not.
I mean, the existence of that list pretty much answers your question. There are other similar lists that can be found with a google search if you need to verify it. That list is all the games that support the Wii Motion Plus. So, to answer your question, no, it doesn't improve games that don't support it. It's only actually used by the games on that list. There's nothing "technical" to discuss; that's just how the device works.
I was thinking that Nintendo improved the remote with that addon but if I think better it's like you said @la-li-lu-le-lo. I was asking this because I want to buy a normal remote (not the plus one) and I was unsure if is all that I need to play the majority of the games satisfactory; sadly the plus one have a high price than the normal one, ex. 5$ dollars vs 15$... Thanks! P.S. I find a list with detailed info: https://wiki.gbatemp.net/wiki/Motion_Plus_supported_games_list