Request: please add new activities

On most Garmin watches, you can add whatever sport you wish. Check out your user manual - an example for the Forerunner 735XT is here: https://www8.garmin.com/manuals/webhelp/forerunner735/EN-US/GUID-6D055816-2C05-49F5-8BE7-B4E0A7C09570.html

Not valid for forerunner 235 but thanks for help

Well, on Forerunner 235 you have even better possibilities - ConnectIQ - just download the Badminton widget from the store:

https://apps.garmin.com/en-US/apps/51606451-57e2-4f99-9420-2ba5a80b5df6

... and there are some other options as well:

https://apps.garmin.com/en-US/search?q=badminton&device=&deviceLimit=&appType=&sort=&start=0&count=30

If nothing of it matches your needs, you can develop your own app, or hire someone to do it

Did it, installed badminton app. Quite nice. Name of the activity is 'Badminton' but tyle is 'Other' because this type is not implemented in Garmin

Name of the activity is 'Badminton' but tyle is 'Other' because this type is not implemented in Garmin

And what's wrong with Other? It would make no sense having a separate category for every sport in the universe, when all what the watch does for most of them, is the same thing anyway. Separate categories have sense only at groups of sports requiring a different type of tracking - for example outdoor sports using GPS, swimming detecting the strokes and turns, etc. Most of indoor sports are, from the point of view of the fitness tracking, completely identical, so the category Other is just fine for them.

That's, true but I import activities to Endomondo and have to change there manually (it is badminton activity). But it's not the issue. 

There are many types of activity you can enter manually in Garmin Connect. However badminton is missing!

I agree. Why isn't there a activity for pickleball, racquetball and tennis?  Pickleball is huge around here and we play for hours.