I am new to kivy. I want to know if there is a way to create a textinput with autocomplete functionality, that lets you select from a dictionary with 200 items. 
Similar to the select2 that you have in HTML/CSS
You can implement it yourself, just bind the on_text event and change the suggestion_text property. you may also check for TAB key press event to know when to change the text to the suggested completion.
Kivy TextInput with autocomplete